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), (-1, 0, 1), (0, -1, 0), (1, 0, -1), (1, 1, 1)}.
A149773
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), (-1, 0, 1), (0, -1, 0), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =77a(5) =327a(6) =1405a(7) =6273a(8) =28345a(9) =128809a(10) =594849a(11) =2751489a(12) =12860325a(13) =60358301a(14) =284534221a(15) =1348008781a(16) =6402370295a(17) =30524174069a(18) =145886185525a(19) =698970734067
External references
- oeis: A149773