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 A155190 #2 Mar 30 2012 17:22:54 %S A155190 2,4,7,9,16,25,27,42,54,61,63,70,75,87,90,121,126,129,135,186,211,246, %T A155190 315,333,345,396,405,540,556,690,717,801,924,960,1080,1863,2376,2826, %U A155190 3900,6210,8316 %N A155190 Non-triangular numbers having a unique representation as p + t, where p is prime and t is a triangular number. %C A155190 Conjectured to be finite. The prime terms are in A065397. %e A155190 n=p+t: 2=2+0; 4=3+1; 7=7+0; 9=3+6; 16=13+3; 25=19+6; 27=17+10; 42=41+1; 54=53+1 %Y A155190 A132399, A154752 %K A155190 nonn %O A155190 1,1 %A A155190 _T. D. Noe_, Jan 21 2009