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 A351994 #39 Mar 05 2022 01:05:54 %S A351994 1,320,2300606464,289899537900576358400, %T A351994 614482906548854364363387716704247808, %U A351994 21564742087547836976004856537464240189331001616154755072,12433415382338420812828401445037903120443542018197863908895102595928462876835840 %N A351994 Number of spanning trees in a hexagon of size n in the triangular grid. %C A351994 The hexagon of size n in the triangular grid has A003215(n) vertices. %H A351994 Peter Kagey, <a href="/A351994/a351994.png">Image of one of the a(4) = 614482906548854364363387716704247808 spanning trees of size 4.</a> %Y A351994 Cf. A007341 (square in square grid), A116469 (rectangle in square grid), A174579 (triangle in triangular grid), A351888 (triangle in hexagonal grid), A352022 (hexagon in hexagonal grid). %K A351994 nonn %O A351994 0,2 %A A351994 _Peter Kagey_, Feb 28 2022