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A363546
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G.f. satisfies A(x) = exp( Sum_{k>=1} A(x^k) * x^k/(k * (1 - 3*x^k)) ).
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6
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1, 1, 5, 22, 105, 497, 2431, 11976, 59928, 302816, 1545660, 7955132, 41255625, 215378364, 1131134574, 5972272636, 31684600709, 168824599282, 903080385252, 4848038120323, 26110774945462, 141048622038068, 764026532321068, 4149020129689451
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OFFSET
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0,3
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LINKS
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FORMULA
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A(x) = (1 - 3*x) * B(x) where B(x) is the g.f. of A363541.
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PROG
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(PARI) seq(n) = my(A=1); for(i=1, n, A=exp(sum(k=1, i, subst(A, x, x^k)*x^k/(k*(1-3*x^k)))+x*O(x^n))); Vec(A);
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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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