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 A260046 #17 Jul 24 2015 03:50:07 %S A260046 25,159,175,242,245,287,303,319,459,500,575,591,623,679,687,699,735, %T A260046 763,1135,1167,1203,1243,1247,1271,1351,1371,1391,1525,1631,1734,1911, %U A260046 2167,2173,2231,2285,2295,2319,2359,2463,2471,2495,2519,2743,2779,2787,2863,2890 %N A260046 Composites whose prime factorization in base 2 is an anagram of the number in base 2. %H A260046 Giovanni Resta, <a href="/A260046/b260046.txt">Table of n, a(n) for n = 1..10000</a> %e A260046 25 = 5^2. In base 2, 11001 = 101^10. %t A260046 Select[Range[10^6], !PrimeQ[#] && Sort@ IntegerDigits[#, 2] == Sort@ Flatten@ IntegerDigits[ Select[ Flatten@ FactorInteger@ #, #>1 &], 2] &] (* _Giovanni Resta_, Jul 14 2015 *) %Y A260046 Cf. A260047, A260048, A260049, A260050, A260051, A260052, A260053, A025283, A260054, A260055. %K A260046 base,easy,nonn %O A260046 1,1 %A A260046 _Stephen Tucker_, Jul 14 2015