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A062323
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Triangle with a(n,n)=1, a(n,k)=(n-1)*a(n-1,k)+a(n-2,k) for n>k.
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1
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1, 0, 1, 1, 1, 1, 2, 3, 2, 1, 7, 10, 7, 3, 1, 30, 43, 30, 13, 4, 1, 157, 225, 157, 68, 21, 5, 1, 972, 1393, 972, 421, 130, 31, 6, 1, 6961, 9976, 6961, 3015, 931, 222, 43, 7, 1, 56660, 81201, 56660, 24541, 7578, 1807, 350, 57, 8, 1, 516901, 740785, 516901, 223884
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,7
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FORMULA
| a(n, k)=k*a(n, k+1)+a(n, k+2) for n>k.
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CROSSREFS
| Essentially the same as A058294, but more easy seen as a triangle. Columns include A001040, A001053, A058307, A058308, A058309. Other sequences appearing on the right hand side include A000012, A001477, A002061, A034262.
Sequence in context: A065369 A167772 A077870 * A020858 A090664 A086764
Adjacent sequences: A062320 A062321 A062322 * A062324 A062325 A062326
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KEYWORD
| nonn,tabl
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Jul 05 2001
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