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, 0), (-1, 1, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
A148436
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, 0), (-1, 1, 1), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =19a(5) =66a(6) =278a(7) =1083a(8) =4749a(9) =19813a(10) =89902a(11) =392386a(12) =1818172a(13) =8165084a(14) =38348338a(15) =175674079a(16) =833439373a(17) =3874392957a(18) =18520418884a(19) =87049560421a(20) =418534476354
External references
- oeis: A148436