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, 0, 1), (1, 0, 1), (1, 1, -1)}.
A150449
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, 0, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =103a(5) =422a(6) =1897a(7) =8252a(8) =38343a(9) =173194a(10) =817272a(11) =3772830a(12) =18000984a(13) =84356373a(14) =405594146a(15) =1921360373a(16) =9287840494a(17) =44344952313a(18) =215279896503
External references
- oeis: A150449