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 A097014 #13 Dec 12 2021 22:39:52 %S A097014 104,1,211,2,3,8311689,5,4,7,3698,399,130321,6,9,13,8,1477,2458624,10, %T A097014 725904,19,676,6751,18766224,14,52707600,489,24649,12,220433409,29,16, %U A097014 21,1250,2779,3694084,22,5184,37,18,27,1382976,20,729,43,128,217 %N A097014 Smallest x such that sigma(x) mod 210 = n. %C A097014 Compare with A084303 and A097013. %C A097014 Row 210 of A074625 (apart from different ordering). - _Michel Marcus_, Dec 19 2013 %H A097014 Michel Marcus, <a href="/A097014/b097014.txt">Table of n, a(n) for n = 0..209</a> %e A097014 Several numbers belonging to odd residues are either large squares or twice-squares. %e A097014 E.g.: r = n = 209: a(209) = 36324729 = 6027^2, sigma(6027^2) = 210*172974 + 209. %e A097014 Full set is easily available running through squares or twice squares. %Y A097014 Cf. A000203, A084301, A084303, A097011, A097012, A097013, A097015. %K A097014 fini,nonn %O A097014 0,1 %A A097014 _Labos Elemer_, Aug 19 2004