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 A306476 #6 Feb 18 2019 09:56:30 %S A306476 10556208,10578672,10589904,10612368,10657296,10690992,10702224, %T A306476 10747152,10825776,10859472,10870704,10881936,10938096,10949328, %U A306476 10971792,10983024,11005488,11039184,11050416,11095344,11117808,11196432,11207664,11252592,11286288,11319984 %N A306476 Numbers k, with sigma(k) >= 3k and sigma(k) divisible by 3, that are not in A204830. %C A306476 From an idea of _Amiram Eldar_. Analogous sequence to A171641. The divisors of the listed terms k cannot be arranged in three disjoint sets each of them adding to sigma(k)/3. %Y A306476 Cf. A023197, A083207, A171641, A204830, A319186. %K A306476 nonn %O A306476 1,1 %A A306476 _Giovanni Resta_, Feb 18 2019