60816

Appears in sequences

• Expansion of 1/((1-2x)(1-4x)(1-8x)(1-10x)).at n=4A025977
• Expansion of (1+x^2)/(1-x-x^5) = (1+x^2)/((1-x+x^2)*(1-x^2-x^3)).at n=40A098523
• Consider all consecutive integer Pythagorean septuples (X, X+1, X+2, X+3, Z-2, Z-1, Z) ordered by increasing Z; sequence gives X values.at n=4A157088
• a(0) = 1; a(n) = Sum_{k=0..n-1} binomial(n,k)^2 * 2^(n-k-1) * a(k).at n=5A340886
• E.g.f. satisfies log(A(x)) = x^3 * (exp(x) - 1) * A(x).at n=8A356950