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, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
A150831
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, 0), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =134a(5) =590a(6) =2650a(7) =12064a(8) =55742a(9) =259760a(10) =1220165a(11) =5767786a(12) =27395139a(13) =130723031a(14) =626095767a(15) =3007682664a(16) =14490348210a(17) =69982637896a(18) =338693616769
External references
- oeis: A150831