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A205777 G.f. satisfies: A(x) = 1/Product_{n>=1} (1 - x^n/A(x^n)^n). 1

%I #7 Mar 30 2012 18:37:34

%S 1,1,1,1,0,2,-2,2,-2,0,1,-3,0,-4,2,1,-2,2,2,-6,-12,11,6,-9,23,-42,103,

%T -100,44,6,-105,162,-291,239,-115,79,202,-13,452,-539,-240,-548,183,

%U -18,-26,703,-1537,2751,-609,2091,2162,-4328,5156,-8972,-7340,-125,-8678

%N G.f. satisfies: A(x) = 1/Product_{n>=1} (1 - x^n/A(x^n)^n).

%H Paul D. Hanna, <a href="/A205777/b205777.txt">Table of n, a(n) for n = 0..1000</a>

%e G.f.: A(x) = 1 + x + x^2 + x^3 + 2*x^5 - 2*x^6 + 2*x^7 - 2*x^8 + x^10 +...

%e where

%e A(x) = 1/((1 - x/A(x)) * (1 - x^2/A(x^2)^2) * (1 - x^3/A(x^3)^3) *...).

%o (PARI) {a(n)=local(A=1+x); for(i=1, n, A=1/prod(k=1, n, (1-x^k/subst(A, x, x^k+x*O(x^n))^k))); polcoeff(A, n)}

%K sign

%O 0,6

%A _Paul D. Hanna_, Jan 31 2012

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)