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, -1, 1), (1, 0, 1), (1, 1, -1)}.
A148884
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, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =97a(6) =389a(7) =1441a(8) =5889a(9) =23616a(10) =99002a(11) =413417a(12) =1776811a(13) =7615131a(14) =33341337a(15) =145808687a(16) =647319019a(17) =2875484141a(18) =12912706883a(19) =58054041349a(20) =263234386877
External references
- oeis: A148884