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, 1), (-1, 0, 1), (0, 1, -1), (1, -1, 0), (1, 0, 0)}.
A148112
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, 1), (-1, 0, 1), (0, 1, -1), (1, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =29a(6) =84a(7) =269a(8) =881a(9) =2978a(10) =10534a(11) =37631a(12) =138156a(13) =517621a(14) =1961323a(15) =7567042a(16) =29532445a(17) =116500782a(18) =464882279a(19) =1870733737a(20) =7594358700a(21) =31071320808a(22) =127996498806a(23) =530873129314
External references
- oeis: A148112