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, 0, 0), (0, 0, 1), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.
A150142
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, 0, 0), (0, 0, 1), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =73a(5) =282a(6) =1131a(7) =4672a(8) =19724a(9) =84752a(10) =369429a(11) =1629435a(12) =7259192a(13) =32615418a(14) =147619128a(15) =672411537a(16) =3080081649a(17) =14179056899a(18) =65562383998a(19) =304359944046
External references
- oeis: A150142