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, 0, -1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
A149611
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, 0, -1), (0, -1, 1), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =63a(5) =239a(6) =1011a(7) =4189a(8) =18057a(9) =77893a(10) =341857a(11) =1507917a(12) =6713433a(13) =30039549a(14) =135215513a(15) =611198839a(16) =2774510515a(17) =12637593187a(18) =57749756479a(19) =264625723379
External references
- oeis: A149611