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0, 3, 9, 47, 321, 2607, 24099, 247527, 2783331, 33924303, 445016619, 6249234807, 93541817331, 1487200667103, 25037315924859, 445123900236807, 8336458657796931, 164100631571947503, 3388128151043405259
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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PROG
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(PARI) {a(n)=local(M=matrix(n+3, n+3, m, j, if(m==j, 1, if(m==j+1, -m+1, -(m-j-1)*polcoeff(log(sum(i=0, m, (i+2)!/2!*x^i)), m-j-1))))); if(n<0, 0, sum(i=1, #M, (M^0-M)^i/i)[n+3, 3])}
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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