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A155813
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a(n) = [x^(n+1)*y] exp( Sum_{m>=1} (3^m + y)^m * x^m/m ), in which the coefficients of x^n*y^k are integer for n>=k>=0.
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1
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1, 12, 801, 540720, 3499254081, 206071208583660, 109444624780070083617, 523382147212408702381556928, 22528830325874782877760713232652641, 8728012905287889947187989190298586968026540
(list; graph; refs; listen; history; internal format)
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