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, 0, 1), (0, 1, -1), (1, 0, 1)}.
A150401
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, 0, 1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =92a(5) =374a(6) =1538a(7) =6509a(8) =27994a(9) =121689a(10) =535411a(11) =2372651a(12) =10586473a(13) =47532474a(14) =214380849a(15) =971155815a(16) =4415983287a(17) =20143551363a(18) =92158741074a(19) =422717920670
External references
- oeis: A150401