Number of types of maximal mixed orthogonal arrays with n runs.

Terms

a(0) =0a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =1a(9) =1a(10) =1a(11) =4a(12) =1a(13) =1a(14) =1a(15) =2a(16) =1a(17) =2a(18) =1a(19) =4a(20) =1a(21) =1a(22) =1