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, 0, 1), (-1, 1, 1), (1, -1, -1), (1, 1, 0)}.
A149154
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, 0, 1), (-1, 1, 1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =9a(4) =39a(5) =112a(6) =511a(7) =1655a(8) =7754a(9) =27061a(10) =128714a(11) =472720a(12) =2270366a(13) =8651976a(14) =41837362a(15) =163948096a(16) =796796614a(17) =3191331555a(18) =15570137360a(19) =63466080257a(20) =310584371757
External references
- oeis: A149154