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, 0), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
A150801
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, 0), (0, 0, 1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =132a(5) =572a(6) =2567a(7) =11697a(8) =54085a(9) =252536a(10) =1188950a(11) =5632253a(12) =26822989a(13) =128295939a(14) =615915211a(15) =2966142385a(16) =14323235723a(17) =69328421550a(18) =336263280061
External references
- oeis: A150801