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, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A148762
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, 1), (-1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =29a(5) =79a(6) =341a(7) =1067a(8) =4745a(9) =15959a(10) =72573a(11) =256539a(12) =1183001a(13) =4339855a(14) =20218213a(15) =76289395a(16) =358226465a(17) =1382092567a(18) =6530138429a(19) =25653670427a(20) =121817296793a(21) =485782664255
External references
- oeis: A148762