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), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
A148555
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), (-1, 0, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =18a(5) =47a(6) =141a(7) =432a(8) =1329a(9) =4452a(10) =14295a(11) =49817a(12) =167179a(13) =591475a(14) =2062501a(15) =7357786a(16) =26446105a(17) =95239479a(18) =349688079a(19) =1274422929a(20) =4742103229a(21) =17511528513a(22) =65687166495a(23) =245724681207a(24) =926977717315
External references
- oeis: A148555