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, -1, 0), (-1, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150683
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, -1, 0), (-1, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =116a(5) =428a(6) =1998a(7) =7846a(8) =37336a(9) =152208a(10) =732226a(11) =3060418a(12) =14830916a(13) =63105628a(14) =307405454a(15) =1325797950a(16) =6483199136a(17) =28258790888a(18) =138595056794a(19) =609285087066
External references
- oeis: A150683