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, 0, 0)}.
A150109
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, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =69a(5) =263a(6) =1044a(7) =4240a(8) =17595a(9) =74391a(10) =318493a(11) =1378895a(12) =6022039a(13) =26520440a(14) =117549906a(15) =524068965a(16) =2348103782a(17) =10568464412a(18) =47754218422a(19) =216537083286a(20) =984983798215
External references
- oeis: A150109