Number of indecomposable binary [ n,4 ] codes without 0 columns.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =3a(6) =10a(7) =28a(8) =71a(9) =165a(10) =361a(11) =754a(12) =1503a(13) =2893a(14) =5393a(15) =9773a(16) =17273a(17) =29860a(18) =50557a(19) =84024a(20) =137228a(21) =220542a(22) =349128a(23) =544980a(24) =839453