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), (0, 1, 1), (1, 1, -1)}.
A150152
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), (0, 1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =74a(5) =280a(6) =1114a(7) =4524a(8) =18754a(9) =79016a(10) =337266a(11) =1454404a(12) =6331178a(13) =27766808a(14) =122588426a(15) =544370788a(16) =2429515266a(17) =10891604192a(18) =49023258306a(19) =221441740324
External references
- oeis: A150152