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Search: id:A059294
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| A059294 |
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2-boustrophedon transform (defined in Maple code) applied to 1, 0, 0, 0, ... |
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+0
5
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| 1, 1, 1, 3, 13, 73, 505, 4143, 39313, 423401, 5101785, 67994611, 993048765, 15770916657, 270586214481, 4987678532991, 98297729816321, 2062591323728689, 45908909743929681, 1080350557160580163, 26800186367114537613, 698982753383076195897
(list; graph; listen)
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OFFSET
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0,4
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MAPLE
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TBOUS := proc(a) local c, i, j, n: if whattype(a) <> list then RETURN([]); fi: n := min( nops(a), 60); for i from 0 to n-1 do c[i, 0] := a[i+1]; od; for i from 1 to n-1 do for j from 1 to i-1 do c[i, j] := c[i, j-1] + c[i-1, i-j] + c[i-1, i-j-1]; od; c[i, i] := c[i, i-1] + c[i-1, 0]; od; RETURN([seq(c[i, i], i=0..n-1)]); end:
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CROSSREFS
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Sequence in context: A063512 A132846 A000262 this_sequence A124468 A128196 A119013
Adjacent sequences: A059291 A059292 A059293 this_sequence A059295 A059296 A059297
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KEYWORD
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nonn
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AUTHOR
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njas, Jan 25 2001
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