This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A377004 #10 Oct 13 2024 07:09:50 %S A377004 1,1,4,19,194,3144,65548,1272696,21855504,328629713,4362818853, %T A377004 51658865022,551021529952,5342121192394,47446872310092, %U A377004 388746259849648,2956322263908194,20980847841062062,139630332607991630,875184633222730558,5186438905325403553 %N A377004 Number of inequivalent 2*n X 8 binary arrays with row sums 4 and column sums n up to row and column permutations. %e A377004 The a(2) = 4 inequivalent matrices are: %e A377004 [1 1 1 1 0 0 0 0] [1 1 1 1 0 0 0 0 ] [1 1 1 1 0 0 0 0] [1 1 1 1 0 0 0 0] %e A377004 [1 1 1 1 0 0 0 0] [1 1 1 0 1 0 0 0 ] [1 1 0 0 1 1 0 0] [1 1 0 0 1 1 0 0] %e A377004 [0 0 0 0 1 1 1 1] [0 0 0 1 0 1 1 1 ] [0 0 1 1 0 0 1 1] [0 0 1 0 1 0 1 1] %e A377004 [0 0 0 0 1 1 1 1] [0 0 0 0 1 1 1 1 ] [0 0 0 0 1 1 1 1] [0 0 0 1 0 1 1 1] %Y A377004 Column k=4 of A377007. %Y A377004 Cf. A172555, A377003. %K A377004 nonn %O A377004 0,3 %A A377004 _Andrew Howroyd_, Oct 12 2024