Number of binary [ n,5 ] codes without 0 columns.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =5a(6) =17a(7) =54a(8) =163a(9) =465a(10) =1283a(11) =3480a(12) =9256a(13) =24282a(14) =62812a(15) =160106a(16) =401824a(17) =992033a(18) =2406329a(19) =5730955a(20) =13393760a(21) =30709772a(22) =69079030a(23) =152473837a(24) =330344629a(25) =702839150a(26) =1469214076a(27) =3019246455a(28) =6103105779a(29) =12142291541