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, 0), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
A150430
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, 0), (0, 1, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =97a(5) =401a(6) =1692a(7) =7409a(8) =32894a(9) =147976a(10) =673011a(11) =3091440a(12) =14317001a(13) =66635816a(14) =312060730a(15) =1469011146a(16) =6939920335a(17) =32907071979a(18) =156569859687a(19) =747072761700
External references
- oeis: A150430