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Search: id:A058257
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| A058257 |
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Triangle read by rows: this is a variant of A008280 in which 2 rows go from left to right, 2 from right to left, 2 from left to right, etc. |
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+0
4
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| 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 3, 2, 1, 0, 0, 0, 3, 5, 6, 6, 6, 0, 0, 3, 8, 14, 20, 26, 71, 71, 71, 68, 60, 46, 26, 0, 413, 342, 271, 200, 132, 72, 26, 0, 0, 0, 413, 755, 1026, 1226, 1358, 1430, 1456, 1456, 1456, 0, 0, 413, 1168, 2194, 3420, 4778, 6208, 7664, 9120, 10576
(list; table; graph; listen)
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OFFSET
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0,11
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COMMENT
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Suggested by first Atkinson reference.
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REFERENCES
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M. D. Atkinson: Zigzag permutations and comparisons of adjacent elements, Information Processing Letters 21 (1985), 187-189.
M. D. Atkinson: Partial orders and comparison problems, Sixteenth Southeastern Conference on Combinatorics, Graph Theory and Computing, (Boca Raton, Feb 1985), Congressus Numerantium 47, 77-88.
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LINKS
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J. Millar, N. J. A. Sloane and N. E. Young, A new operation on sequences: the Boustrophedon on transform, J. Combin. Theory, 17A 44-54 1996 (Abstract, pdf, ps).
Index entries for sequences related to boustrophedon transform
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EXAMPLE
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1; 0,1; 0,0,1; 1,1,1,0; 3,2,1,0,0; 0,3,5,6,6,6; ...
1
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CROSSREFS
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Cf. A058258, A008280, A000111.
Sequence in context: A111541 A105629 A085075 this_sequence A083199 A021761 A071960
Adjacent sequences: A058254 A058255 A058256 this_sequence A058258 A058259 A058260
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KEYWORD
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nonn,easy,tabl,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Dec 06 2000
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Dec 12 2000
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