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, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1), (1, 1, 0)}.
A150881
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, 1), (0, 1, -1), (0, 1, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =33a(4) =148a(5) =681a(6) =3207a(7) =15307a(8) =73822a(9) =358559a(10) =1751143a(11) =8587649a(12) =42250473a(13) =208397918a(14) =1030017125a(15) =5099350476a(16) =25279913728a(17) =125465667926a(18) =623278510259
External references
- oeis: A150881