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, 1, -1), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148185
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, 1, -1), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =29a(6) =94a(7) =278a(8) =970a(9) =3069a(10) =11089a(11) =37091a(12) =138443a(13) =483322a(14) =1845168a(15) =6635284a(16) =25734140a(17) =94761794a(18) =372853177a(19) =1400085802a(20) =5569660993a(21) =21238904959a(22) =85264061205a(23) =329441656481
External references
- oeis: A148185