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), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
A148941
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), (0, -1, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =29a(5) =101a(6) =371a(7) =1393a(8) =5374a(9) =21200a(10) =84822a(11) =344036a(12) =1412127a(13) =5848840a(14) =24435170a(15) =102820071a(16) =435455990a(17) =1854675147a(18) =7939933182a(19) =34146502646a(20) =147461595987a(21) =639215585208
External references
- oeis: A148941