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Search: id:A112916
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| 1, 2, 7, 34, 207, 1496, 12420, 115938, 1198831, 13582010, 167187547, 2221174504, 31675372612, 482628099144, 7825665501852, 134562607924194, 2446051941152127, 46873289933397206, 944492559814284397
(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)=local(A=Mat(1), B); for(m=2, n+1, 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(Vec(Ser(vector(n+1, i, (A^-1)[i, 1]))^2)[n+1])}
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CROSSREFS
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Cf. A088716, A112915, A112911.
Sequence in context: A056543 A075834 A011800 this_sequence A145845 A002720 A111539
Adjacent sequences: A112913 A112914 A112915 this_sequence A112917 A112918 A112919
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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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