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), (-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
A149019
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), (-1, 0, 1), (1, -1, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =35a(5) =131a(6) =539a(7) =2178a(8) =9466a(9) =39944a(10) =178102a(11) =779382a(12) =3535378a(13) =15837243a(14) =72810285a(15) =331162556a(16) =1538465914a(17) =7082275082a(18) =33160005984a(19) =154175852070a(20) =726421380590
External references
- oeis: A149019