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, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
A149747
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, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =17a(4) =79a(5) =321a(6) =1497a(7) =6611a(8) =31267a(9) =142939a(10) =683295a(11) =3189011a(12) =15358587a(13) =72654977a(14) =351786797a(15) =1679905819a(16) =8166596697a(17) =39267480997a(18) =191484682817a(19) =925533860027
External references
- oeis: A149747