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 A084292 #13 Feb 11 2025 01:29:18 %S A084292 110,77,38,104,74,161,87,111,94,159,122,142,374,209,178,206,206,253, %T A084292 326,302,206,302,471,249,519,341,346,303,354,481,542,377,2057,533,386, %U A084292 411,5138,662,846,527,386,437,1034,519,794,689,626,493,566,629,873,527,638 %N A084292 a(n) = 6n + A054904(n). %C A084292 Composite solutions y to sigma(y-6n) = sigma(y) - 6n. For terms x of A054904, where sigma(x+6n) = sigma(x) + 6n, replacing x+6n = y, x = y-6n, we get sigma(y) - 6n = sigma(y-6n). %H A084292 Amiram Eldar, <a href="/A084292/b084292.txt">Table of n, a(n) for n = 1..724</a> %Y A084292 Cf. A000203 (sigma), A054904, A084293. %Y A084292 For several analogous sequences such corresponding "mirror-solutions" can be easily constructed. See, e.g., A015913-A015918, A050507, A054799, A054903-A054906, A054982-A054987, A059118, A055009, A055458, A063500, etc. %K A084292 nonn %O A084292 1,1 %A A084292 _Labos Elemer_, May 26 2003