-686

Appears in sequences

• Expansion of (1+2x)/sqrt((1-3x^2)(1+4x+5x^2)).at n=11A102882
• Expansions of the characteristic polynomials of certain matrices, see Mathematica code.at n=16A136449
• The main diagonal of the successive differences of A154127.at n=12A154570
• Numerator of Hermite(n, 3/19).at n=2A159620
• Totally multiplicative sequence with a(p) = 7*(p-3) for prime p.at n=33A167317
• Triangle read by rows: coefficients T(n,k) of a binomial decomposition of n^n as Sum(k=0..n)T(n,k)*binomial(n,k).at n=17A244134
• G.f.: Re((i; x)_inf), where (a; q)_inf is the q-Pochhammer symbol, i = sqrt(-1).at n=49A278399
• Expansion of phi(x)^2 * chi(x^2)^4 * f(-x)^2 in powers of x where phi(), chi(), f() are Ramanujan theta functions.at n=37A280339
• Nonzero terms in row sums of the lower triangular part of a square matrix formed by Dirichlet convolution of adjacent columns in the square matrix A191898.at n=29A316274
• Expansion of 1/sqrt(1 - 4*x/(1+x)^3).at n=13A360133
• Expansion of Sum_{k>0} (1/(1+x^k)^3 - 1).at n=32A363630
• E.g.f. A(x) satisfies A(x) = exp( 2 * sin(x * A(x)) / A(x) ).at n=5A381414