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), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
A148133
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), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =28a(6) =79a(7) =232a(8) =736a(9) =2295a(10) =7511a(11) =25302a(12) =86950a(13) =300370a(14) =1065759a(15) =3839576a(16) =13953744a(17) =51197935a(18) =190807055a(19) =717234202a(20) =2712764266a(21) =10353167908a(22) =39891162812a(23) =154541802382a(24) =602000096362
External references
- oeis: A148133