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, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
A150787
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, 0), (1, 0, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =136a(5) =578a(6) =2729a(7) =12297a(8) =59170a(9) =274909a(10) =1337955a(11) =6335345a(12) =31052823a(13) =148900795a(14) =733293712a(15) =3547179137a(16) =17527323964a(17) =85330022249a(18) =422654866104
External references
- oeis: A150787