66528000

Appears in sequences

• Fourier coefficients of Eisenstein series of degree 2 and weight 4: a(n) = coefficient of the matrix [n, 1/2; 1/2, 1] with determinant n-1/4.at n=22A323990
• Integers k such that A000010(k) <= A008480(k).at n=26A364750
• Numbers of least prime signature (A025487) whose prime factorization has equal sum of even and odd exponents.at n=20A371600
• E.g.f. satisfies A(x) = exp( x^2*A(x)^2 * (1 + x*A(x)) ).at n=9A376476