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 A298746 #8 Jan 26 2018 09:02:32 %S A298746 2,3,5,7,10,11,13,14,15,17,18,19,21,22,23,26,27,29,30,31,34,35,37,39, %T A298746 41,42,43,45,46,47,50,51,53,54,55,58,59,61,62,63,66,67,69,70,71,73,74, %U A298746 75,77,78,79,81,82,83,85,86,87,89,90,91,93,94,95,97,98,99,101,103,106,107,109,110,111,113,114,115,117,118 %N A298746 Numbers n whose base-2 representation can be written as the concatenation of the base-2 representations of a list of prime numbers, allowing leading zeros. %C A298746 Has positive density in the positive integers, which can be proved by considering only those numbers obtained using the primes 2 and 3. %e A298746 For example, 26 is such a number because 26 in base 2 is 11010, which can be written as the concatenation (11)(010). %Y A298746 Cf. A090421, which does not allow leading zeros. %K A298746 nonn,base %O A298746 1,1 %A A298746 _Jeffrey Shallit_, Jan 25 2018