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Search: id:A046902
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| A046902 |
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Clark's triangle: left border = 0 1 1 1..., right border = multiples of 6; other entries = sum of 2 entries above. |
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+0
3
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| 0, 1, 6, 1, 7, 12, 1, 8, 19, 18, 1, 9, 27, 37, 24, 1, 10, 36, 64, 61, 30, 1, 11, 46, 100, 125, 91, 36, 1, 12, 57, 146, 225, 216, 127, 42, 1, 13, 69, 203, 371, 441, 343, 169, 48, 1, 14, 82, 272, 574, 812, 784, 512, 217, 54, 1, 15, 96, 354, 846, 1386, 1596, 1296, 729, 271
(list; table; graph; listen)
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OFFSET
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0,3
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REFERENCES
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J. E. Clark, Clark's triangle, Math. Student, 26 (No. 2, 1978), p. 4.
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FORMULA
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c(n, k) = 6*binomial(n, k-1) + binomial(n-1, k). - Max Alekseyev (maxale(AT)gmail.com), Nov 06 2005
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EXAMPLE
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0; 1 6; 1 7 12; 1 8 19 18;...
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CROSSREFS
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Cf. A100206.
Sequence in context: A131231 A110942 A082830 this_sequence A143019 A156921 A094214
Adjacent sequences: A046899 A046900 A046901 this_sequence A046903 A046904 A046905
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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).
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EXTENSIONS
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More terms from Larry Reeves (larryr(AT)acm.org), Apr 07 2000
More terms from Max Alekseyev (maxale(AT)gmail.com), May 12 2005
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