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, 0, 0), (-1, 1, 0), (0, 0, -1), (1, 1, 1)}.
A149576
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, 0, 0), (-1, 1, 0), (0, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =15a(4) =51a(5) =199a(6) =755a(7) =2789a(8) =11425a(9) =45069a(10) =177057a(11) =733665a(12) =2980725a(13) =12049305a(14) =50487645a(15) =208617687a(16) =859190427a(17) =3628046575a(18) =15169356395a(19) =63268216427a(20) =268773317191
External references
- oeis: A149576