Number of 4 X n binary matrices such that any 2 rows have a common 1, up to column permutations.

A052388

Number of 4 X n binary matrices such that any 2 rows have a common 1, up to column permutations.

Terms

    a(0) =0a(1) =1a(2) =16a(3) =146a(4) =955a(5) =4905a(6) =20907a(7) =76851a(8) =250530a(9) =739612a(10) =2009177a(11) =5085119a(12) =12109526a(13) =27348478a(14) =58955082a(15) =121956402a(16) =243172488a(17) =469115187a(18) =878387366a(19) =1600751976a(20) =2845918041a(21) =4946262815a(22) =8419256605a(23) =14057377245a(24) =23055913530a(25) =37192403430a(26) =59075703351a(27) =92488040301

External references