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Search: id:A059430
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| A059430 |
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Cumulative boustrophedon transform of 1, 1, 1, 1, ... |
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+0
3
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| 1, 2, 6, 26, 168, 1575, 20355, 347026, 7544974, 203740685, 6689616195, 262455558837, 12125816088194, 651621526430030, 40298978168771397, 2841833840854800621, 226670892373665762106, 20303920347033450136016, 2029489177032856597849714
(list; graph; listen)
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OFFSET
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0,2
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FORMULA
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See Maple code for precise description.
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MAPLE
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CBOUS2 := proc(a) option remember; local c, i, j, n, r: 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 to n-1 do for j to i do c[i, j] := c[i, j-1] + add(c[i-1, i-r], r=1..j); od; od; RETURN([seq(c[i, i], i=0..n-1)]); end:
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CROSSREFS
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See the triangles in A059433 and A059434.
Sequence in context: A141713 A005272 A002449 this_sequence A086584 A032014 A112948
Adjacent sequences: A059427 A059428 A059429 this_sequence A059431 A059432 A059433
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Jan 31 2001
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