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, 0, -1)}.
A149065
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, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =11a(4) =40a(5) =163a(6) =675a(7) =2886a(8) =12689a(9) =56478a(10) =255603a(11) =1168905a(12) =5394434a(13) =25095146a(14) =117492138a(15) =553152779a(16) =2616933716a(17) =12431990751a(18) =59275716489a(19) =283546088317
External references
- oeis: A149065