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), (1, 0, 1), (1, 1, 0)}.
A150075
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), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =66a(5) =217a(6) =814a(7) =2854a(8) =10830a(9) =39020a(10) =150669a(11) =551717a(12) =2141530a(13) =7965570a(14) =31023777a(15) =116458802a(16) =455951716a(17) =1722943694a(18) =6760597014a(19) =25718083565a(20) =101077038578a(21) =386268666289
External references
- oeis: A150075