Number of 4 X n binary matrices up to row and column permutations.

Terms

a(0) =1a(1) =5a(2) =22a(3) =87a(4) =317a(5) =1053a(6) =3250a(7) =9343a(8) =25207a(9) =64167a(10) =155004a(11) =357009a(12) =787586a(13) =1670643a(14) =3419552a(15) =6774765a(16) =13027340a(17) =24372942a(18) =44462456a(19) =79240762a(20) =138204782a(21) =236258358a(22) =396409924a(23) =653639898a(24) =1060379169a(25) =1694174350a(26) =2668300758a(27) =4146300078a(28) =6361709115a(29) =9644583474