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Search: id:A102012
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| 1, 3, 1, 16, 7, 1, 115, 61, 15, 1, 1056, 626, 206, 31, 1, 11774, 7554, 2989, 659, 63, 1, 154624, 105099, 47349, 13308, 2052, 127, 1, 2337507, 1660957, 824331, 274677, 56935, 6297, 255, 1, 39984640, 29428654, 15747154, 5960818, 1518478, 237862
(list; table; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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Triangle begins:
1
3, 1
16, 7, 1
115, 61, 15, 1
1056, 626, 206, 31, 1
11774, 7554, 2989, 659, 63, 1
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MAPLE
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A101842 := proc(n, k) option remember ; if k < -n or k >= n then 0 ; elif n = 1 then 1; else (n-k)*A101842(n-1, k-1)+A101842(n-1, k)+(n+k+1)*A101842(n-1, k+1) ; fi ; end: A102012 := proc(n, k) A101842(n, k-1) ; end: for n from 1 to 10 do for k from 1 to n do printf("%d, ", A102012(n, k)) ; od: od: - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 07 2007
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CROSSREFS
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Sequence in context: A053485 A143565 A143018 this_sequence A128249 A071211 A038675
Adjacent sequences: A102009 A102010 A102011 this_sequence A102013 A102014 A102015
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KEYWORD
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nonn,tabl
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AUTHOR
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David Applegate (david(AT)research.att.com), Jun 19 2007
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 07 2007
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