952560

Appears in sequences

• sec(exp(x)-cos(x))=1+1/2!*x^2+6/3!*x^3+21/4!*x^4+120/5!*x^5...at n=9A013320
• Triangle of coefficients in expansion of (6+7x)^n.at n=23A013627
• Triangle whose (i,j)-th entry is binomial(i,j)*7^(i-j)*6^j.at n=25A038272
• Number of reversible strings with n beads using exactly six different colors.at n=8A056313
• Number of primitive (aperiodic) reversible strings with n beads using exactly six different colors.at n=8A056322
• Number of 6-ary Lyndon words of length n with trace 0 and subtrace 3 over Z_6.at n=10A074425
• Number of 6-ary Lyndon words of length n with trace 1 and subtrace 4 over Z_6.at n=10A074432
• Number of 6-ary Lyndon words of length n with trace 2 and subtrace 1 over Z_6.at n=10A074435
• Number of 6-ary Lyndon words of length n with trace 3 and subtrace 0 over Z_6.at n=10A074440
• a(0)=1. a(n) = smallest positive multiple of a(n-1) such that a(n) contains the binary representation of n at least once somewhere within its binary representation.at n=16A141288
• a(0)=1. a(n) = smallest positive multiple of a(n-1) such that a(n) contains the binary representation of n at least once somewhere within its binary representation.at n=17A141288
• Number of 6Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=8A208145
• Coefficients in q-expansion of (E_2*E_4 - E_6)/720, where E_2, E_4, E_6 are the Eisenstein series shown in A006352, A004009, A013973, respectively.at n=30A281372
• Triangle read by rows: T(n,k) is the number of rows of n colors with exactly k different colors counting chiral pairs as equivalent, i.e., the rows are reversible.at n=41A305621
• Triangle read by rows: T(n,k) is the number of chiral pairs of rows of n colors with exactly k different colors.at n=41A305622
• Number of chiral pairs of rows of n colors with exactly 6 different colors.at n=8A305626
• Triangular array of the number of binary, rooted, leaf-labeled tree topologies with n leaves and k cherries, n >= 2, 1 <= k <= floor(n/2).at n=17A306364