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, 0), (0, -1, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
A150419
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, 0), (0, -1, 1), (1, 0, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =95a(5) =381a(6) =1613a(7) =6932a(8) =30505a(9) =136024a(10) =614390a(11) =2803286a(12) =12898887a(13) =59793748a(14) =278890182a(15) =1307942025a(16) =6162995635a(17) =29161344023a(18) =138493371160a(19) =659897593518
External references
- oeis: A150419