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 A051456 #4 Jul 02 2025 16:01:58 %S A051456 4,7,13,12,20,25,10,45,24,13,50,112,161,154,98,40,63,162,273,315,252, %T A051456 138,16,225,435,588,567,390,60,660,1023,1155,957,19,111,396,1683,2178, %U A051456 2112,825,319,84,130,507,3861,4290,1144,403,22,637,4004,8151,6006,1547 %N A051456 (Terms in A029625)/2. %Y A051456 A029625, A029168. %K A051456 nonn %O A051456 0,1 %A A051456 _James Sellers_