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 A376822 #7 Oct 05 2024 16:30:45 %S A376822 0,5,62,4154,1342206,1908897150,11488774559742,288230376353050814, %T A376822 29850020237398264483838,12676506002282327791964489726, %U A376822 21970710674130840874443091905462270,154866286100907105149651981766316633972734,4427744605404865645682169434028029029963535286270 %N A376822 Number of colorings of a toroidal n X n grid using exactly two colors under translational symmetry. %H A376822 Andrew Howroyd, <a href="/A376822/b376822.txt">Table of n, a(n) for n = 1..50</a> %F A376822 a(n) = A179043(n) - 2. %Y A376822 Main diagonal of A294684. %Y A376822 Cf. A179043, A376747 (colors permutable), A376823, A376824, A376825. %K A376822 nonn %O A376822 1,2 %A A376822 _Andrew Howroyd_, Oct 05 2024