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, 0, -1), (0, -1, 1), (0, 1, 1), (1, 1, 0)}.
A150431
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, 0, -1), (0, -1, 1), (0, 1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =24a(4) =98a(5) =381a(6) =1626a(7) =6793a(8) =29484a(9) =128021a(10) =564403a(11) =2500084a(12) =11170691a(13) =50116462a(14) =226143658a(15) =1024155781a(16) =4656130957a(17) =21235409051a(18) =97128731541a(19) =445394455074
External references
- oeis: A150431