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 A030226 #15 Aug 26 2023 02:50:15 %S A030226 0,0,0,3,11,65,287,1373,6370,30149,142638,681520,3270604,15789461, %T A030226 76562081,372832744,1822142769,8934740804,43938715224,216650217219, %U A030226 1070791145115,5303851997213,26323053574543,130878372709130,651812928565763,3251215398061949,16240020484212325,81227147300622466,406770969577924068,2039375196443918387 %N A030226 Number of n-celled polyhexes (hexagonal polyominoes) without bilateral symmetry. %H A030226 John Mason, <a href="/A030226/b030226.txt">Table of n, a(n) for n = 1..36</a> %Y A030226 Cf. A000228, A030225. %K A030226 nonn %O A030226 1,4 %A A030226 _David W. Wilson_ %E A030226 More terms from _Joseph Myers_, Sep 21 2002 %E A030226 a(21)-a(30) from _John Mason_, Jul 18 2023