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 A176588 #4 Mar 30 2012 19:00:24 %S A176588 1,21,51,6321,8421,931,10521,111,1264321,14721,15531,168421,171, %T A176588 1896321,20105421,21731,221121,231,2412864321,261321,27931,28147421, %U A176588 291,30151065321,32168421,331131,341721,35751,361812964321,371 %N A176588 a(n) = A176558(A175354(n)) = numbers m as reverse concatenations of divisors of numbers from A175354, where A175354 = numbers k such that reverse concatenations of divisors of k are nonprimes. %e A176588 a(9) = 1264321 because A089374(9) = 12 and divisors of 12 are 1, 2, 3, 4, 6, 12; reverse concatenation of divisors A176558(12) = 1264321 is nonprime. %Y A176588 Subsequence of A176558(n) = reverse concatenation of divisors of n. %K A176588 nonn,base %O A176588 1,2 %A A176588 _Jaroslav Krizek_, Apr 21 2010 %E A176588 Edited by _Charles R Greathouse IV_, Apr 24 2010