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, 0, -1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150181
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, 0, -1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =78a(5) =312a(6) =1278a(7) =5420a(8) =23296a(9) =101923a(10) =451779a(11) =2022699a(12) =9141354a(13) =41598369a(14) =190612949a(15) =878343803a(16) =4066810827a(17) =18916970654a(18) =88330523815a(19) =413911461910
External references
- oeis: A150181