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 A217601 #51 Aug 08 2025 23:29:35
%S A217601 4,1314,7128,3081302,4009568,5312966,16834447856,2462344442400,
%T A217601 289274033242208,46671783125431818542,221000817555367050608,
%U A217601 618811172463743796896678,13954866972387224169218132,176536110349401666017009273532,996528450408723697487070591774
%N A217601 Integer averages of squares of first primes.
%H A217601 Paul W. Dyson, <a href="/A217601/b217601.txt">Table of n, a(n) for n = 1..16</a>
%H A217601 OEIS Wiki, <a href="/wiki/Sums_of_primes_divisibility_sequences">Sums of powers of primes divisibility sequences</a>
%F A217601 a(n) = A217600(n)/A111441(n).
%e A217601 a(2) = 1314 is the average of squares of first 19 primes (24966/19=1314).
%o A217601 (PARI) n=s=0; forprime(p=2,1e8, s+=p^2; if(s%n++==0, print1(s/n", "))) \\ _Charles R Greathouse IV_, Apr 22 2015
%Y A217601 Cf. A085450 (smallest m > 1 such that m divides Sum_{k=1..m} prime(k)^n).
%Y A217601 Cf. A007504, A045345, A171399, A128165, A233523, A050247, A050248, A024450, A111441, A217599, A128166, A233862, A217600, A217601.
%K A217601 nonn
%O A217601 1,1
%A A217601 _Robert Price_, Mar 19 2013
%E A217601 a(13) from _Karl-Heinz Hofmann_, Dec 08 2020
%E A217601 a(14) from _Karl-Heinz Hofmann_, Dec 26 2020
%E A217601 a(15) from _Karl-Heinz Hofmann_, Dec 27 2020