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, 1, 1), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
A150629
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, 1, 1), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =115a(5) =494a(6) =2199a(7) =9999a(8) =45977a(9) =213553a(10) =1001518a(11) =4728343a(12) =22440120a(13) =106995630a(14) =512350724a(15) =2461339951a(16) =11857180503a(17) =57274958341a(18) =277281579581
External references
- oeis: A150629