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), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
A149233
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), (0, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =32a(5) =110a(6) =360a(7) =1195a(8) =4144a(9) =14386a(10) =49928a(11) =175670a(12) =625360a(13) =2217916a(14) =7928624a(15) =28528467a(16) =102759712a(17) =371080938a(18) =1345548072a(19) =4892984610a(20) =17803931984a(21) =64981731748a(22) =237693327312a(23) =870395679966
External references
- oeis: A149233