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, 1), (-1, 0, 0), (-1, 1, 0), (0, 0, -1), (1, 0, 0)}.
A148511
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, 1), (-1, 0, 0), (-1, 1, 0), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =36a(6) =128a(7) =320a(8) =1140a(9) =3246a(10) =11434a(11) =35916a(12) =125474a(13) =422089a(14) =1477804a(15) =5192274a(16) =18397703a(17) =66315629a(18) =239082564a(19) =875153486a(20) =3212013856a(21) =11889752467a(22) =44309767139a(23) =165710641660a(24) =624879419948
External references
- oeis: A148511