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), (-1, 1, 1), (1, 0, -1), (1, 0, 0)}.
A148758
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), (-1, 1, 1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =28a(5) =81a(6) =352a(7) =1154a(8) =5208a(9) =18450a(10) =85202a(11) =317719a(12) =1489930a(13) =5762701a(14) =27316040a(15) =108584686a(16) =518762827a(17) =2106471761a(18) =10123531026a(19) =41810856886a(20) =201869469476a(21) =845355773410
External references
- oeis: A148758