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Search: id:A112912
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| 1, 2, 8, 44, 298, 2358, 21154, 211100, 2313030, 27566654, 354806116, 4903884712, 72444584732, 1139381007880, 19012236634968, 335560664081388, 6247230709277958, 122375974186267566, 2516528486416495240
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OFFSET
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0,2
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FORMULA
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a(n) = Sum_{k=0..n-1} (n-k+1)*A088716(k)*a(n-k-1) for n>0 with a(0)=1.
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PROGRAM
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(PARI) {a(n)=local(A=Mat(1), B); for(m=2, n+2, B=matrix(m, m); for(i=1, m, for(j=1, i, if(j==i, B[i, j]=1, B[i, j]=-j*(A^-1)[i-j, 1]); )); A=B); return((A^-1)[n+2, 2])}
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CROSSREFS
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Cf. A088716, A112911.
Sequence in context: A120928 A111537 A051045 this_sequence A124467 A075792 A052897
Adjacent sequences: A112909 A112910 A112911 this_sequence A112913 A112914 A112915
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KEYWORD
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nonn
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AUTHOR
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Paul D. Hanna (pauldhanna(AT)juno.com), Oct 06 2005
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