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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150971
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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =158a(5) =717a(6) =3309a(7) =15375a(8) =72555a(9) =344182a(10) =1640966a(11) =7863210a(12) =37826596a(13) =182448229a(14) =882425744a(15) =4277829024a(16) =20776458752a(17) =101076141067a(18) =492491511517
External references
- oeis: A150971