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, 1), (-1, 0, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149299
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, 1), (-1, 0, 0), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =46a(5) =167a(6) =720a(7) =2915a(8) =12974a(9) =55630a(10) =253309a(11) =1124806a(12) =5206427a(13) =23665135a(14) =110878569a(15) =512404479a(16) =2423117125a(17) =11336431183a(18) =53998337998a(19) =255018739528
External references
- oeis: A149299