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), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.
A148927
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), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =27a(5) =95a(6) =336a(7) =1244a(8) =4781a(9) =18477a(10) =73322a(11) =296046a(12) =1207052a(13) =4987746a(14) =20793422a(15) =87421781a(16) =370790380a(17) =1582749908a(18) =6797872346a(19) =29363763117a(20) =127460556855a(21) =555943978956
External references
- oeis: A148927