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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
A150661
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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =122a(5) =555a(6) =2588a(7) =12277a(8) =58913a(9) =285117a(10) =1388522a(11) =6794467a(12) =33370370a(13) =164371665a(14) =811518081a(15) =4014028257a(16) =19884948419a(17) =98631030741a(18) =489728806588
External references
- oeis: A150661