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), (-1, 1, 0), (0, 1, 1), (1, -1, -1)}.
A148312
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), (-1, 1, 0), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =37a(6) =116a(7) =370a(8) =1183a(9) =3971a(10) =13628a(11) =46960a(12) =166220a(13) =595358a(14) =2147833a(15) =7868630a(16) =29023310a(17) =107874868a(18) =404840947a(19) =1527363806a(20) =5798828595a(21) =22158950502a(22) =85027989852a(23) =328009874266
External references
- oeis: A148312