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, 0), (1, 1, 0)}.
A149469
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, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =54a(5) =214a(6) =919a(7) =3984a(8) =17772a(9) =80080a(10) =366595a(11) =1691770a(12) =7877604a(13) =36926470a(14) =174112034a(15) =824899323a(16) =3925561729a(17) =18748361538a(18) =89833469739a(19) =431690857897
External references
- oeis: A149469