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), (-1, 0, -1), (1, 0, 1), (1, 1, 1)}.
A150675
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), (-1, 0, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =112a(5) =414a(6) =1842a(7) =7242a(8) =32804a(9) =133800a(10) =613052a(11) =2562776a(12) =11836532a(13) =50365642a(14) =234002666a(15) =1009167634a(16) =4710183476a(17) =20528989512a(18) =96167408220a(19) =422736061420
External references
- oeis: A150675