47656

Appears in sequences

• a(n) = (n+1)*(n^2+n+2)/2; g.f.: (1 + 2*x^2) / (1 - x)^4.at n=45A006000
• a(n) = sigma[k](n) - phi(n)^k - d(n)^k for k=3.at n=38A079539
• Numbers which are the sum of two positive cubes and divisible by 23.at n=24A101806
• Members of a pair (m,k) such that sigma(m) = sigma(k) = sigma(m+k), m < k where sigma = A000203.at n=20A239436
• Number of ways of placing n balls into boxes 1,2,... in such a way that any two adjacent boxes contain at least 4 balls.at n=20A257666
• Number of cyclic subgroups of the group GL(2, Z(n)), counting conjugates as distinct.at n=27A316560