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A101845
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Triangle formed by left half of A101842, read by rows.
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2
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1, 1, 3, 1, 7, 16, 1, 15, 61, 115, 1, 31, 206, 626, 1056, 1, 63, 659, 2989, 7554, 11774, 1, 127, 2052, 13308, 47349, 105099, 154624, 1, 255, 6297, 56935, 274677, 824331, 1660957, 2337507, 1, 511, 19162, 237862, 1518478, 5960818, 15747154, 29428654
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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EXAMPLE
| Triangle begins:
1,
1, 3,
1, 7, 16,
1, 15, 61, 115,
1, 31, 206, 626, 1056,
1, 63, 659, 2989, 7554, 11774,
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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: A101845 := proc(n, k) A101842(n, -n+k-1) ; end: for n from 1 to 10 do for k from 1 to n do printf("%d, ", A101845(n, k)) ; od: od: - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 07 2007
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CROSSREFS
| Sequence in context: A161380 A051927 A194595 * A193606 A096643 A199656
Adjacent sequences: A101842 A101843 A101844 * A101846 A101847 A101848
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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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