21677

Appears in sequences

• Number of prime parts in the last section of the set of partitions of n.at n=37A144120
• 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, 1, -1), (0, 0, 1), (1, -1, 0), (1, 1, -1)}.at n=10A148331
• Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any north, west or northwest neighbors modulo 4 and the upper left element equal to 0.at n=9A267405
• Numbers k such that (349*10^k - 7)/9 is prime.at n=20A284595