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, 1), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
A148965
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, 1), (0, 1, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =31a(5) =105a(6) =411a(7) =1549a(8) =6231a(9) =25289a(10) =104763a(11) =440389a(12) =1878783a(13) =8081057a(14) =35193059a(15) =154280861a(16) =682012423a(17) =3034589177a(18) =13581750123a(19) =61124230837a(20) =276429656655
External references
- oeis: A148965