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 A277725 #8 Oct 30 2016 13:38:58 %S A277725 0,12,18,31,49,62,68,80,93,99,112,130,136,143,161,174,180,211,217,224, %T A277725 242,248,255,261,286,292,323,329,336,342,354,360,367,373,404,410,423, %U A277725 435,441,448,454,472,485,491,516,522,535,553,560,566,572,584,597,603,616,634,640,647,665,678,684,709,715 %N A277725 Intersection of A158919 and A277723. %C A277725 See A277728 for discussion. %Y A277725 Cf. A003144, A003145, A003146, A058265, A158919, A275926, A276799, A276800, A277722, A277723, A277724, A277725, A277726, A277727, A277728. %K A277725 nonn %O A277725 1,2 %A A277725 _N. J. A. Sloane_, Oct 30 2016