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, 0), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150953
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, 0), (1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =35a(4) =157a(5) =681a(6) =3184a(7) =14449a(8) =68514a(9) =318868a(10) =1528662a(11) =7224945a(12) =34859918a(13) =166473286a(14) =807330834a(15) =3883821511a(16) =18902679334a(17) =91430966947a(18) =446307098244
External references
- oeis: A150953