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, 1, 1)}.
A149527
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, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =53a(5) =149a(6) =737a(7) =2351a(8) =11629a(9) =39687a(10) =197311a(11) =707205a(12) =3519205a(13) =13028739a(14) =64938435a(15) =246751393a(16) =1230673099a(17) =4768324351a(18) =23797616719a(19) =93712372299a(20) =467883669379
External references
- oeis: A149527