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, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
A148106
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, 1), (0, 1, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =27a(6) =79a(7) =258a(8) =843a(9) =2884a(10) =10206a(11) =36727a(12) =135231a(13) =506297a(14) =1931767a(15) =7482415a(16) =29281327a(17) =115997541a(18) =464211257a(19) =1872876225a(20) =7615571704a(21) =31194424964a(22) =128696451725a(23) =534298615063
External references
- oeis: A148106