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 A055880 #12 Jun 17 2020 16:50:04 %S A055880 1,13,69,347,1736,3993,41059,215842,498546,2202398,10866824,54261537, %T A055880 637482331,3370498978,7788765114,34411960682,169793870966, %U A055880 847836388608,4238615459929,49803023550277,263320090876701,1323752940946163 %N A055880 Quotients arising from sequence A053317. %H A055880 Ray Chandler, <a href="/A055880/b055880.txt">Table of n, a(n) for n = 1..1431</a> (terms < 10^1000) %F A055880 a(n) = A053317(n)/2^n - _David Wasserman_, Apr 28 2002 %Y A055880 Cf. A023398, A053317, A050620. %K A055880 nonn,base %O A055880 1,2 %A A055880 _J. Lowell_, Jul 15 2000 %E A055880 More terms from _David Wasserman_, Apr 28 2002