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), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
A148094
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), (0, 0, 1), (0, 1, -1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =25a(6) =75a(7) =217a(8) =686a(9) =2136a(10) =7143a(11) =23473a(12) =81750a(13) =280112a(14) =1000476a(15) =3529443a(16) =12926899a(17) =46740449a(18) =174248545a(19) =642573826a(20) =2432741851a(21) =9116884251a(22) =34979496027a(23) =132930156161a(24) =515588023612
External references
- oeis: A148094