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), (1, -1, 1), (1, 1, 0)}.
A150200
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), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =79a(5) =317a(6) =1317a(7) =5624a(8) =24530a(9) =108604a(10) =487311a(11) =2208305a(12) =10096297a(13) =46490710a(14) =215418829a(15) =1003528417a(16) =4696763841a(17) =22073015276a(18) =104111130685a(19) =492660437574
External references
- oeis: A150200