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 A378940 #7 Dec 18 2024 19:20:29 %S A378940 0,15,275,5726,116166,2301877,45280509,889477656,17470103108, %T A378940 343131620201,6739543393711,132373673619692,2599998546891870, %U A378940 51067506790572861,1003035296281103375,19700977608538546036,386953998564799463776,7600302885548184827385,149280286962228069289683 %N A378940 Number of nonzero 5 X n binary arrays with all 1's connected. %C A378940 Equivalently, the number of connected (non-null) induced subgraphs in the grid graph P_5 X P_n. %H A378940 Andrew Howroyd, <a href="/A378940/b378940.txt">Table of n, a(n) for n = 0..500</a> %H A378940 <a href="/index/Rec#order_33">Index entries for linear recurrences with constant coefficients</a>, order 33. %Y A378940 Row 5 of A287151. %K A378940 nonn %O A378940 0,2 %A A378940 _Andrew Howroyd_, Dec 18 2024