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, 1, 0), (0, 0, -1), (0, 1, 0), (1, -1, 1)}.
A148408
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, 1, 0), (0, 0, -1), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =17a(5) =55a(6) =182a(7) =643a(8) =2384a(9) =8953a(10) =34333a(11) =133626a(12) =530606a(13) =2133524a(14) =8644984a(15) =35438834a(16) =146590627a(17) =610689574a(18) =2563048975a(19) =10817091462a(20) =45933788835a(21) =196112722486a(22) =840788136757
External references
- oeis: A148408