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, 0, 0), (-1, 0, 1), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
A149465
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, 0, 0), (-1, 0, 1), (0, 0, -1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =53a(5) =201a(6) =840a(7) =3574a(8) =15657a(9) =68851a(10) =307490a(11) =1388692a(12) =6344965a(13) =29161051a(14) =134782622a(15) =626411797a(16) =2927546988a(17) =13742107029a(18) =64735935244a(19) =305917618200
External references
- oeis: A149465