320484

Appears in sequences

• 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, 1), (-1, 1, 1), (1, 0, 1), (1, 1, -1)}.at n=10A149419
• Poincaré series for hyperbolic reflection group with Coxeter diagram shown in Comments.at n=17A265054
• a(n) = 256n^2 - 828n + 656 (n>=1).at n=36A304379