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), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.
A151131
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), (0, 0, -1), (0, 1, 0), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =3a(2) =11a(3) =45a(4) =198a(5) =882a(6) =4006a(7) =18505a(8) =86473a(9) =406981a(10) =1928110a(11) =9185789a(12) =43958967a(13) =211147220a(14) =1017380648a(15) =4915403582a(16) =23804986783a(17) =115526616241a(18) =561669161351
External references
- oeis: A151131