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 A350978 #29 Mar 08 2022 18:44:35 %S A350978 3,9,19,31,33,35,51,73,81,99,105,129,145,147,161,163,179,195,201,233, %T A350978 243,273,289,291,297,339,361,387,393,451,465,467,483,489 %N A350978 Appears to be an erroneous version of A050795. %H A350978 E.-B. Escott, <a href="/A350978/a350978.pdf">Query 2521</a>, L'Intermédiaire des Mathématiciens, 10 (1903), 285. %K A350978 dead %O A350978 1,1 %A A350978 _N. J. A. Sloane_, Mar 06 2022 %E A350978 Thanks to _Chai Wah Wu_ for pointing out that something was wrong, and to _David Applegate_ and _Allan C. Wechsler_ for identifying the correct version of this sequence.