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 A076343 #5 Mar 30 2012 18:50:26 %S A076343 4,8,15,8,16,17,31,24,15,24,47,32,33,40,49,48,63,65,49,79,56,64,47,95, %T A076343 72,95,80,63,88,113,97,127,96,81,104,145,97,120,129,143,120,161,175, %U A076343 159,136,191,144,145,111,144,129,160,209,191,168,143,239,176,241,143 %N A076343 A076340(A001358(n)), real part of semiprimes mapped as defined in A076340, A076341. %e A076343 Applying the map as defined in A076340, A076341: %e A076343 A001358(15)=39=3*13=(4-1)*(12+1) -> (4,-1)*(12,1) = (4*12+1,4-12) = (49,-8), therefore a(15)=49 and A076344(120)=-8. %Y A076343 Imaginary part = A076344, A076342, A076347. %K A076343 nonn %O A076343 1,1 %A A076343 _Reinhard Zumkeller_, Oct 08 2002