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A102012
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Triangle formed by right half of A101842, read by rows.
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2
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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EXAMPLE
| 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
| 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
| Sequence in context: A168319 A143565 A143018 * A128249 A071211 A038675
Adjacent sequences: A102009 A102010 A102011 * A102013 A102014 A102015
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KEYWORD
| nonn,tabl
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AUTHOR
| David Applegate (david(AT)research.att.com), Jun 19 2007
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EXTENSIONS
| More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 07 2007
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