51660

Appears in sequences

• Numbers having four 7's in base 9.at n=28A043484
• A triangle of numbers related to triangle A049325.at n=30A049410
• Sum of all partitions of n into distinct parts.at n=41A066189
• a(n) = (n+1)(n+2)^2*(n+3)^2*(n+4)(7n^2 + 23n + 20)/2880.at n=6A108178
• Triangle read by rows: (1/5) * (A007318^4 - A007318^(-1)) as infinite lower triangular matrices.at n=50A131050
• Transform of the finite sequence (1, 0, -1, 0, 1, 0, -1) by the T_{1,0} transformation (see link).at n=13A159338
• Smallest number which is an unordered sum of two odd abundant numbers in exactly n ways.at n=31A187743
• Numbers with prime factorization pqrs^2t^2.at n=29A189989
• Triangle T(n,m) = coefficient of x^n in expansion of x^m*(x+1)^(log(1+x)*m) = sum(n>=m, T(n,m) x^n*m!/n!).at n=40A202185
• Degrees of irreducible representations of orthogonal group O8-(3).at n=35A214474
• Expansion of e.g.f. exp(x^4/4)/(1 - x).at n=8A319365
• Numbers k for which A306927(k) [= A001615(k)-k] is a multiple of A344705(k) [= A001615(k)-A001065(k)], and their quotient is nonnegative.at n=48A344700
• Convolution of Jacobsthal numbers and Pell numbers.at n=13A350551
• Irregular triangle read by rows: T(n,k) is the number of k-crossing partitions on 2n nodes, where all partition terms alternate in parity, counted up to reflection.at n=53A368054