65962domain: NAppears in sequences75-gonal numbers: a(n) = n*(73*n-71)/2.at n=43A098230Row sums of triangle A137712.at n=23A137713Number 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, -1), (-1, -1, 1), (0, 0, 1), (0, 1, 1), (1, 1, -1)}.at n=9A150082