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, 0, 0)}.
A150197
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, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =79a(5) =309a(6) =1249a(7) =5169a(8) =21765a(9) =92972a(10) =401689a(11) =1751826a(12) =7701210a(13) =34083739a(14) =151727337a(15) =678869577a(16) =3050982026a(17) =13766056536a(18) =62331604383a(19) =283125629691
External references
- oeis: A150197