A381418 E.g.f. A(x) satisfies A(x) = exp( 2 * sin(x * A(x)) ).
1, 2, 12, 126, 1920, 38594, 966336, 29013502, 1016725248, 40756464002, 1840019388416, 92407718510206, 5110719354064896, 308687318601431618, 20219267260662005760, 1427631259848921544702, 108098847179804608299008, 8738141126983786551626498, 751078053821468153074155520
Offset: 0
Keywords
Programs
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PARI
a136630(n, k) = 1/(2^k*k!)*sum(j=0, k, (-1)^(k-j)*(2*j-k)^n*binomial(k, j)); a(n) = 2*sum(k=0, n, (2*n+2)^(k-1)*I^(n-k)*a136630(n, k));