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, 0, 0), (0, 1, 0), (1, -1, -1), (1, 1, 0)}.
A150063
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, 0, 0), (0, 1, 0), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =18a(4) =63a(5) =226a(6) =864a(7) =3353a(8) =13492a(9) =55230a(10) =230555a(11) =973313a(12) =4164492a(13) =18014395a(14) =78699792a(15) =346360582a(16) =1534976053a(17) =6847432097a(18) =30734846866a(19) =138669026551a(20) =628473868348
External references
- oeis: A150063