66525

Appears in sequences

• Numbers k such that k and k^2 use only the digits 2, 4, 5, 6 and 7.at n=41A137094
• Number of ordered pairs of endofunctions f,g on a set of n elements satisfying f(f(f(x))) = g(g(g(x))).at n=5A235326
• Triangle read by rows: T(n,k) is the number of achiral colorings of the facets of a regular n-dimensional orthotope using exactly k colors. Row n has 2n columns.at n=46A325011
• G.f. A(x) satisfies A(x) = 1 + x + x*A(x)^(5/2).at n=8A366452