29275domain: NAppears in sequencesn * (11*n^2 + 6*n + 1) / 6.at n=25A215646a(n) is the smallest positive integer which can be represented as the sum of n distinct nonzero tetrahedral numbers in exactly n ways, or -1 if no such integer exists.at n=24A360217Number of partitions of n with at most five part sizes.at n=40A364809