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, 1), (-1, 1, 0), (-1, 1, 1), (1, 0, -1), (1, 1, 0)}.
A149158
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, 1), (-1, 1, 0), (-1, 1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =39a(5) =112a(6) =514a(7) =1664a(8) =7851a(9) =27382a(10) =131105a(11) =481129a(12) =2325552a(13) =8853388a(14) =43081144a(15) =168640035a(16) =824599205a(17) =3299204419a(18) =16190983750a(19) =65931058149a(20) =324475345942
External references
- oeis: A149158