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, 0, -1), (1, 0, 1)}.
A149395
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, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =50a(5) =185a(6) =785a(7) =3219a(8) =13961a(9) =60297a(10) =267127a(11) =1187586a(12) =5354462a(13) =24250826a(14) =110838445a(15) =508707367a(16) =2349685667a(17) =10893337771a(18) =50738613227a(19) =237092564801
External references
- oeis: A149395