1451520

Appears in sequences

• Lah numbers: a(n) = (n-1)*n!/2.at n=7A001286
• Order of orthogonal group O(n, GF(2)).at n=6A003053
• Order of universal Chevalley group B_n (2) or symplectic group Sp(2n,2).at n=3A003923
• Order of universal Chevalley group B_3(q), q = prime power.at n=0A003932
• Order of simple Chevalley group B_3(q), q = prime power.at n=0A003939
• Sum of divisors of superabundant numbers (A004394).at n=27A007626
• Triangle of coefficients in expansion of (1+12x)^n.at n=40A013619
• Triangle of numbers T(n,k) = k!*Stirling2(n,k) read by rows (n >= 1, 1 <= k <= n).at n=43A019538
• Number of reversible strings with n labeled beads of 4 colors, no palindromes of more than 1 bead.at n=5A032071
• Triangle whose (i,j)-th entry is binomial(i,j)*2^(i-j)*6^j.at n=40A038212
• Triangle whose (i,j)-th entry is binomial(i,j)*3^(i-j)*4^j.at n=40A038222
• Triangle read by rows: (i,j)-th entry is binomial(i,j)*3^(i-j)*8^j.at n=31A038226
• Triangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*3^j.at n=32A038281
• Triangle read by rows: T(n,k) = n!*k.at n=39A051683
• Number of pairs of sequences of cardinality at least 3.at n=9A052521
• E.g.f. 1/((1-x)(1-x^3)).at n=9A052569
• a(0) = 0, a(n) = 4*n! for n > 0.at n=9A052578
• Expansion of E.g.f. x*(1-x)/(1-x-x^3).at n=9A052605
• Expansion of e.g.f. x^2/((1-x)^2*(1+x)).at n=9A052657
• Sum of divisors of Ramanujan's highly composite numbers, or sigma(A002182(n)).at n=33A063072