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Search: id:A090354
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| 1, 1, 3, 19, 190, 2574, 43922, 903986, 21784659, 601478195, 18715354049, 647834803569, 24688869993252, 1027073272425876, 46309250293477020, 2249435671825385244, 117101538463333719891, 6503918951175618656403
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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See comments in A090353.
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PROGRAM
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(PARI) {a(n)=local(A); if(n<1, 0, A=1+x+x*O(x^n); for(k=1, n, B=subst(A^3, x, x/(1-x))/(1-x)+x*O(x^n); A=A-A^4+B); B=subst(A, x, x/(1-x))/(1-x)+x*O(x^n); polcoeff(B^(1/2), n, x))}
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CROSSREFS
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Cf. A090353, A090355.
Adjacent sequences: A090351 A090352 A090353 this_sequence A090355 A090356 A090357
Sequence in context: A121083 A006531 A052888 this_sequence A119394 A101481 A001517
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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), Nov 26 2003
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