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 A087324 #8 Dec 05 2013 19:56:21 %S A087324 2,7,14,22,34,65,77,85,93,97,102,105,106,114,133,134,138,161,165,205, %T A087324 206,214,218,221,222,234,253,254,258,262,265,275,278,301,302,305,306, %U A087324 314,345,354,357,365,377,413,414,437,438,445,446,454,465,466,473,475 %N A087324 Numbers n such that n and its 9's complement both have the same prime signature. %C A087324 Conjecture: (1) Sequence is infinite. (2) For every prime signature there corresponds a term in this sequence. %e A087324 34 is a member as 34= 2*17 and its 9's complement (99-34) = 65 = 13*5 both have the prime signature p*q. %Y A087324 Cf. A087325. %K A087324 base,nonn %O A087324 1,1 %A A087324 _Amarnath Murthy_, Sep 04 2003 %E A087324 Corrected and extended by _David Wasserman_, May 06 2005