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 A191556 #16 Apr 26 2022 16:07:49
%S A191556 11,203,3971,64771,1011875,16752659,267475203,4294709251,68715414027,
%T A191556 1099495919619
%N A191556 Largest k with 2n divisors such that the binary representations of k-1 and k+1 are in base 2 each digitally balanced with 4n digits.
%F A191556 a(n) = Max_{k: k in A191292, A000005(k)=2n, A070939(k-1)=A070939(k+1)=4*n}. - _R. J. Mathar_, Jun 24 2011
%e A191556 a(2) = 203 as 203 has 4 = 2*2 divisors and 202 and 204 are both balanced. - _David A. Corneth_, Apr 26 2022
%Y A191556 Cf. A031443, A191292, A191369, A191534.
%Y A191556 Cf. A000005, A070939.
%K A191556 nonn,base,more
%O A191556 1,1
%A A191556 _Juri-Stepan Gerasimov_, Jun 05 2011
%E A191556 a(4)-a(6) from _R. J. Mathar_, Jun 24 2011
%E A191556 a(7)-a(10) from _David A. Corneth_, Apr 26 2022