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 A133391 #53 Aug 17 2025 17:38:32 %S A133391 0,87,65796,49345379,37546387960,29822760083883,24693298341834533, %T A133391 21113978675102768574,18433608754948081174274, %U A133391 16352255694497179054764665,14692485666215945973239505690,13338380640732671147186590712800,12212907966177661747436156685876997,11262617785640702236670513970349205634 %N A133391 Sum of the squares of primes < 10^n. %H A133391 Bruce Garner, <a href="/A133391/b133391.txt">Table of n, a(n) for n = 0..16</a> (terms 0..13 from Cino Hilliard, 14..15 from Anders Kaseorg) %H A133391 Cino Hilliard, <a href="http://docs.google.com/Doc?docid=dgpq9w4b_14d29xkr&hl=en#">Gmp Demo Sum Primes Squared</a>. %H A133391 Anders Kaseorg, <a href="https://github.com/andersk/prime-summer">prime-summer</a> %e A133391 For n=1 the sum of the squares of the primes less than 10 is 2^2 + 3^2 + 5^2 + 7^2 = 87. %Y A133391 Cf. A131587. %K A133391 nonn %O A133391 0,2 %A A133391 _Cino Hilliard_, Nov 23 2007 %E A133391 Offset corrected by _Anders Kaseorg_, Nov 30 2020