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, -1, 1)}.
A148166
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, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =100a(7) =336a(8) =1164a(9) =4208a(10) =15469a(11) =58466a(12) =225190a(13) =880301a(14) =3496564a(15) =14038923a(16) =56997583a(17) =233660341a(18) =965627303a(19) =4022453551a(20) =16868310880a(21) =71177273008a(22) =302067154265
External references
- oeis: A148166