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, -1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148828
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, -1), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =27a(5) =85a(6) =320a(7) =1131a(8) =4406a(9) =16309a(10) =66319a(11) =257631a(12) =1059441a(13) =4209231a(14) =17719241a(15) =72257735a(16) =305974740a(17) =1264251256a(18) =5432841123a(19) =22812307631a(20) =98420594164a(21) =416837449309
External references
- oeis: A148828