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 A112567 #9 Jun 23 2020 19:10:05 %S A112567 1,1,3,11,47,193,869,3583,12399,51287,217551,867797,3274727,13099145, %T A112567 55568089,216651145,878354151,3609915051,13596245715,55617915013, %U A112567 220140920491,676614665133,2955537029341,11835711831601,48642769948139 %N A112567 Self-convolution equals A112565. %C A112567 A112565 is the main diagonal of square table A112564 of generalized Flavius Josephus sieves. It is not yet certain that this sequence consists entirely of integers. %C A112567 The first non-integral term is a(84) = 102317017376376435483208037493436891797489491884241/2. [From _David Wasserman_, Jul 02 2009] %H A112567 <a href="/index/J#Josephus">Index entries for sequences related to the Josephus Problem</a> %Y A112567 Cf. A112564, A112565, A112566. %K A112567 nonn %O A112567 0,3 %A A112567 _Paul D. Hanna_, Oct 14 2005 %E A112567 More terms from _David Wasserman_, Jul 02 2009