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, 0, 1), (-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149073
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, 0, 1), (-1, 1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =44a(5) =183a(6) =809a(7) =3602a(8) =16501a(9) =76044a(10) =355834a(11) =1672025a(12) =7928491a(13) =37719595a(14) =180484724a(15) =865878172a(16) =4170218920a(17) =20127128889a(18) =97409703571a(19) =472252732792
External references
- oeis: A149073