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 A100555 #4 Mar 30 2012 18:39:59 %S A100555 1,4,9,9,9,16,16,16,25,25,25,25,25,36,36,36,36,36,49,49,49,49,49,49, %T A100555 49,64,64,64,64,64,64,64,81,81,81,81,81,81,81,81,81,100,100,100,100, %U A100555 100,100,100,100,100,121,121,121,121,121,121,121,121,121,121,121,144,144 %N A100555 Smallest square that is equal to the sum of n not-necessarily-distinct primes plus 1. %e A100555 a(1)=4 because 2^2=1+3. %e A100555 a(2)=9 because 3^2=1+3+5. %e A100555 a(3)=9 because 3^2=1+2+3+3. %e A100555 a(4)=9 because 3^2=1+2+2+2+2. %Y A100555 Cf. A100498, A101776-A101778. %K A100555 nonn %O A100555 0,2 %A A100555 _Giovanni Teofilatto_, Dec 31 2004 %E A100555 Corrected and extended by _Ray Chandler_, Jan 10 2005