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, 1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150818
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, 1, 1), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =136a(5) =603a(6) =2762a(7) =12762a(8) =59796a(9) =282112a(10) =1340577a(11) =6401082a(12) =30701136a(13) =147752628a(14) =713229089a(15) =3451491228a(16) =16739404303a(17) =81337802668a(18) =395887118980
External references
- oeis: A150818