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Search: id:A128579
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| 1, 2, 7, 44, 419, 5254, 80687, 1458524, 30259147, 707813762, 18421139495, 527856303160, 16513700403347, 560082210938174, 20471657576850655, 802275966701866964, 33560323690860843995, 1492638035099491033402
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OFFSET
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0,2
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PROGRAM
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(PARI) {a(n)=local(F=1+x, A=0); for(k=0, n, for(j=0, k, F=1+(n+1-j)*x*F^2 +x*O(x^k)); A+=polcoeff(F, k)); A}
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CROSSREFS
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Cf. A128570 (triangle), rows: A128318, A128571, A128572, A128573, A128574, A128575, A128576; A128577 (square of row 0), A128578 (main diagonal).
Sequence in context: A111561 A000155 A077045 this_sequence A001046 A158257 A153522
Adjacent sequences: A128576 A128577 A128578 this_sequence A128580 A128581 A128582
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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), Mar 11 2007
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