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), (0, 1, 0), (1, -1, 1)}.
A148464
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), (0, 1, 0), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =19a(5) =61a(6) =209a(7) =751a(8) =2780a(9) =10530a(10) =40645a(11) =159331a(12) =634004a(13) =2555818a(14) =10406137a(15) =42736003a(16) =176987498a(17) =738572161a(18) =3101989207a(19) =13102951031a(20) =55643811842a(21) =237474178387
External references
- oeis: A148464