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, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
A151038
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, -1), (0, 1, 1), (1, 0, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =3a(2) =9a(3) =33a(4) =123a(5) =459a(6) =1767a(7) =6795a(8) =26397a(9) =103323a(10) =404439a(11) =1591917a(12) =6274389a(13) =24780489a(14) =98110263a(15) =388610895a(16) =1541837565a(17) =6122129877a(18) =24327902433a(19) =96767761083a(20) =385038905697
External references
- oeis: A151038