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), (1, -1, -1), (1, -1, 0), (1, 1, 1)}.
A149511
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), (1, -1, -1), (1, -1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =47a(5) =155a(6) =589a(7) =2243a(8) =8705a(9) =33611a(10) =136141a(11) =533755a(12) =2183941a(13) =8817977a(14) =36131243a(15) =148253195a(16) =613733767a(17) =2532336361a(18) =10586130557a(19) =44008346653a(20) =184760125167a(21) =774426341557
External references
- oeis: A149511