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, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149491
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, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =14a(4) =56a(5) =237a(6) =1036a(7) =4603a(8) =20951a(9) =96544a(10) =448844a(11) =2106027a(12) =9950648a(13) =47254566a(14) =225457864a(15) =1080095458a(16) =5191016887a(17) =25019333735a(18) =120895386015a(19) =585447565802
External references
- oeis: A149491