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, 1, 1), (0, 1, -1), (1, 0, 0)}.
A148592
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, 1, 1), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =57a(6) =191a(7) =647a(8) =2204a(9) =7992a(10) =28194a(11) =104874a(12) =384720a(13) =1449306a(14) =5483215a(15) =20898490a(16) =80658514a(17) =311364894a(18) =1216690972a(19) =4756274956a(20) =18748495518a(21) =74099975703a(22) =294247939801
External references
- oeis: A148592