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 A155775 #6 Dec 12 2015 17:56:51 %S A155775 9,15,33,35,39,55,57,69,75,77,91,203,205,207,209,219,237,247,249,355, %T A155775 365,391,405,483,633,749,1475,1501,1515,1595,1605,1615,1631,2611,2637, %U A155775 2829,11603,11803,13479,20797,20891,95375 %N A155775 Indices j in A000040 such that j is an odd composite and the distinct digits of the prime A000040(j) are in increasing order. %C A155775 These are the odd composites n (A071904) such that the digits of prime(n) are strictly increasing. The latter defines a subsequence of A028864, which lists primes with nondecreasing digits. - _R. J. Mathar_, Jan 30 2009 %e A155775 If odd number=n=9 and prime(9)=23, then 2<3 and 9=a(1). If odd number=n=15 and prime(15)=47, then 4<7 and 15=a(2). If odd number=n=33 and prime(33)=137, then 1<3<7 and 33=a(3), etc. %Y A155775 Cf. A000040, A002808, A155079. %K A155775 nonn,base %O A155775 1,1 %A A155775 _Juri-Stepan Gerasimov_, Jan 27 2009 %E A155775 Corrected and extended by _R. J. Mathar_, Jan 30 2009 %E A155775 Better definition from _Omar E. Pol_, Jan 31 2009