68514domain: NAppears in sequencesT(2n,n-1), T given by A026681.at n=7A026683Number 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, 1), (1, 1, 1)}.at n=8A150953Expansion of e.g.f. ( Product_{k>0} (1+x^k)^k )^(1/(1-x)).at n=6A356394