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, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148157
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, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =30a(6) =96a(7) =303a(8) =1029a(9) =3503a(10) =12545a(11) =45113a(12) =167408a(13) =623906a(14) =2378074a(15) =9109462a(16) =35460401a(17) =138679512a(18) =548909493a(19) =2182414131a(20) =8757633284a(21) =35287783051a(22) =143225649827a(23) =583526061368
External references
- oeis: A148157