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), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
A150597
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), (0, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =108a(5) =459a(6) =1994a(7) =8804a(8) =39668a(9) =180345a(10) =828261a(11) =3835665a(12) =17869380a(13) =83746921a(14) =394258798a(15) =1863940882a(16) =8844326213a(17) =42094388136a(18) =200934619614a(19) =961528165333
External references
- oeis: A150597