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, -1, 1), (-1, 0, -1), (0, 1, 1), (1, -1, -1)}.
A148064
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, -1, 1), (-1, 0, -1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =77a(7) =201a(8) =716a(9) =1989a(10) =6191a(11) =20565a(12) =67734a(13) =215087a(14) =713712a(15) =2478469a(16) =8338392a(17) =27654245a(18) =97731829a(19) =339498647a(20) =1168538528a(21) =4069674521a(22) =14553720972a(23) =51368033395a(24) =179774661926a(25) =647707788441
External references
- oeis: A148064