33628

Appears in sequences

• Sum of the 4th powers of the divisors of n is divisible by n.at n=12A046764
• Triangle read by rows: T(n,k) is the number of connected directed multigraphs with loops and no vertex of degree 0, with n arcs and k vertices.at n=43A139621
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 0), (-1, 0, 1), (1, 0, 0), (1, 1, -1)}.at n=10A148613
• Third left hand column of triangle A163940.at n=21A163943
• Index of first occurrence of n in A165633.at n=30A165765
• Numbers n such that 30n+{11, 13, 17, 19, 23} are 5 consecutive primes.at n=33A182279
• Number of n-node rooted identity trees of height 9.at n=9A229403
• Number of (2n+1)-node rooted identity trees of height n.at n=9A245091
• Irregular triangle read by rows: T(n, k) is the number of 2n-step closed walks on the square lattice having algebraic area k; n >= 0, 0 <= k <= floor(n^2/4).at n=22A352838