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, 1, -1), (-1, 1, 1), (1, -1, 0), (1, 0, 1)}.
A148756
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, 1, -1), (-1, 1, 1), (1, -1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =28a(5) =77a(6) =328a(7) =1032a(8) =4561a(9) =15405a(10) =69863a(11) =247581a(12) =1139957a(13) =4191007a(14) =19505310a(15) =73723498a(16) =345996567a(17) =1336688246a(18) =6313660360a(19) =24830303768a(20) =117888042833a(21) =470535221695
External references
- oeis: A148756