118800

Appears in sequences

• a(n) = 225*(n-1)*(n-2)/2.at n=31A027470
• The number phi_3(n) of Frobenius partitions that allow up to 3 repetitions of an integer in a row.at n=31A053992
• Number of degree-n odd permutations of order dividing 4.at n=10A061136
• Coefficient triangle of generalized Laguerre polynomials n!*L(n,5,x)(rising powers of x).at n=23A062138
• Third column of triangle A062138 (generalized a=5 Laguerre).at n=4A062149
• Triangle T(n,k) = number of rational (0,1) matrices of rank k (n >= 0, 0 <= k <= n).at n=17A064230
• Numbers k such that phi(k) = 2*tau(k)^2.at n=36A068564
• Numbers containing squares of Pythagorean triples in their divisor set.at n=32A096472
• Lah numbers: a(n) = n!*binomial(n-1,7)/8!.at n=3A111598
• Denominators of partial sums for a series for 2*Zeta(2)/3 = (Pi^2)/9.at n=5A130550
• Numbers k such that k and k^2 use only the digits 0, 1, 3, 4 and 8.at n=23A136840
• Triangle of unsigned 3-Lah numbers.at n=23A143498
• Sum of proper divisors of n!: a(n) = sigma(n!) - n!.at n=8A153824
• a(n) = Product_{k=1..n} b(k,n), where b(k,n) is the largest positive integer that, when written in binary, occurs as a substring in both binary k and binary n.at n=10A175490
• Molecular topological indices of the complete tripartite graphs K_{n,n,n}.at n=14A192491
• Molecular topological indices of the crown graphs.at n=24A192796
• G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2*n} T(n,k)^2 * x^k] / A(x)^n * x^n/n ), where T(n,k) is the coefficient of x^k in (1+2*x)^n*(1+3*x)^n.at n=9A251688
• a(n) = RF(n+1,3)*C(n+2,n-1), where RF(a,n) is the rising factorial.at n=8A253285
• Number of nonisomorphic proper colorings of partition multicycle graph using six colors.at n=81A298266
• Theta series of 10-dimensional integral lattice O_10.at n=19A306434