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, -1, 1), (-1, 0, 0), (0, 0, -1), (1, 1, 0)}.
A149091
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, -1, 1), (-1, 0, 0), (0, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =8a(4) =31a(5) =83a(6) =309a(7) =977a(8) =3571a(9) =12395a(10) =45458a(11) =165876a(12) =617495a(13) =2316191a(14) =8773838a(15) =33493548a(16) =128840353a(17) =498456315a(18) =1941252054a(19) =7594394344a(20) =29871433149a(21) =117966578225a(22) =467857554197
External references
- oeis: A149091