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 A048453 #6 Oct 14 2019 23:43:01 %S A048453 127,237,403,520,729,879,1109,1320,1544,1816,2034,2326,2566,2840,3124, %T A048453 3376,3688,3938,4238,4516,4796,5112,5398,5722,6016,6314,6620,6888, %U A048453 7266,7510,7996,8212,8746,8946,9442,9668,10094,10364,10754,11022,11434,11656 %N A048453 Starting from generation 6 add previous and next term yielding generation 7. %Y A048453 Generation 6 is A048452. See A048448-A048466. See also A047844. %K A048453 nonn %O A048453 0,1 %A A048453 _Patrick De Geest_, May 15 1999