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), (0, 0, -1), (1, 0, 0)}.
A148160
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), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =86a(7) =246a(8) =736a(9) =2276a(10) =7240a(11) =22690a(12) =72285a(13) =234747a(14) =771123a(15) =2566400a(16) =8493635a(17) =28334539a(18) =95604553a(19) =324278488a(20) =1108220193a(21) =3778047729a(22) =12939669749a(23) =44644265673a(24) =154504166115a(25) =537300462031
External references
- oeis: A148160