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Search: id:A111558
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| 1, 2, 9, 60, 509, 5034, 55689, 674624, 8838189, 124199454, 1861297049, 29618273604, 498716980989, 8860512190034, 165694162575369, 3254269731689064, 66994569450549869, 1443024570035017254
(list; graph; listen)
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OFFSET
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0,2
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PROGRAM
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(PARI) {a(n)=if(n<0, 0, sum(k=1, n+1, (matrix(n+k, n+k, m, j, if(m==j, 1, if(m==j+1, -m+1, -(m-j-1)*polcoeff(log(sum(i=0, m, (i+3)!/3!*x^i)), m-j-1))))^-1)[n+1, k]))}
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CROSSREFS
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Cf. A111553.
Sequence in context: A009636 A116364 A120970 this_sequence A001193 A120014 A036774
Adjacent sequences: A111555 A111556 A111557 this_sequence A111559 A111560 A111561
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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), Aug 07 2005
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