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, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150027
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, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =19a(4) =74a(5) =298a(6) =1281a(7) =5462a(8) =24099a(9) =108077a(10) =487391a(11) =2236789a(12) =10301023a(13) =47843041a(14) =223735126a(15) =1049895022a(16) =4956915448a(17) =23474704967a(18) =111584020732a(19) =532185167879
External references
- oeis: A150027