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 A195095 #44 Feb 10 2024 10:09:12 %S A195095 1,2,3,8,15,30,63,128,252,510,1023,2040,4095,8190,16365,32768,65535, %T A195095 131040,262143,524280,1048509,2097150,4194303,8388480,16777200, %U A195095 33554430,67108608,134217720,268435455,536870370,1073741823,2147483648,4294966269,8589934590 %N A195095 Duplicate of A011946. %K A195095 dead %O A195095 1,2