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, 0, 1), (-1, 1, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
A149478
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, 0, 1), (-1, 1, 0), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =57a(5) =223a(6) =1028a(7) =4392a(8) =20801a(9) =93192a(10) =448388a(11) =2068395a(12) =10052266a(13) =47272935a(14) =231307163a(15) =1102408601a(16) =5419992341a(17) =26082078971a(18) =128680642305a(19) =623701125067
External references
- oeis: A149478