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, 0, -1), (-1, 0, 1), (1, 0, 1), (1, 1, 0)}.
A150685
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, 0, -1), (-1, 0, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =116a(5) =431a(6) =2009a(7) =7949a(8) =37881a(9) =155471a(10) =750496a(11) =3155109a(12) =15356037a(13) =65667616a(14) =321397790a(15) =1392068398a(16) =6840459473a(17) =29924242302a(18) =147479673677a(19) =650338251086
External references
- oeis: A150685