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, -1, 0), (1, 0, 1)}.
A148223
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, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =31a(6) =99a(7) =273a(8) =963a(9) =2801a(10) =10194a(11) =31206a(12) =116785a(13) =370867a(14) =1412074a(15) =4614618a(16) =17876773a(17) =59575335a(18) =233800362a(19) =794034650a(20) =3142364959a(21) =10840573537a(22) =43293590497a(23) =151088558313a(24) =608045728883
External references
- oeis: A148223