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), (-1, 1, -1), (1, 0, -1), (1, 1, 1)}.
A149542
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), (-1, 1, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =53a(5) =181a(6) =797a(7) =2903a(8) =13207a(9) =51113a(10) =237309a(11) =949867a(12) =4447019a(13) =18266547a(14) =86272555a(15) =360467707a(16) =1716329559a(17) =7273137801a(18) =34833761525a(19) =149321208635a(20) =718010320583
External references
- oeis: A149542