20045

Appears in sequences

• Number of partitions of n into parts not of the form 23k, 23k+6 or 23k-6. Also number of partitions with at most 5 parts of size 1 and differences between parts at distance 10 are greater than 1.at n=38A035994
• 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, -1, -1), (1, -1, 1), (1, 1, 0)}.at n=9A149132
• Smallest k > 0 such that (5^n+k)*5^n-1 and (5^n+k)*5^n+1 are a twin prime pair.at n=41A212487
• Nonequivalent ways to place two different markers (e.g., a pair of Go stones, black and white) on an n X n grid.at n=19A242709
• Number of parts in all partitions of 2n into parts with multiplicity <= n.at n=13A364245