Number of binary [ n,6 ] codes of dimension <= 6 without zero columns.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =36a(6) =79a(7) =186a(8) =462a(9) =1222a(10) =3435a(11) =10397a(12) =33578a(13) =115624a(14) =419789a(15) =1585217a(16) =6130130a(17) =23928972a(18) =93161541a(19) =358570997a(20) =1356178991a(21) =5021267644a(22) =18160079508a(23) =64086748267a(24) =220608700157a(25) =740874170362