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 A138405 #27 Jan 17 2023 17:49:33
%S A138405 28,234,3100,16758,160930,371124,1419568,2475738,6435814,20510308,
%T A138405 28628190,69342588,115854520,147006594,229342798,418192684,714920818,
%U A138405 844592580,1350120618,1804224310,2073066264,3077050158,3939033754,5584051528,8587330848,10510090300
%N A138405 a(n) = prime(n)^5 - prime(n)^2.
%H A138405 Vincenzo Librandi, <a href="/A138405/b138405.txt">Table of n, a(n) for n = 1..200</a>
%H A138405 <a href="/index/Pri#prime_powers">Index to sequences related to prime powers</a>
%F A138405 a(n) = A001248(n)*(A030078(n) - 1). - _Elmo R. Oliveira_, Jan 14 2023
%F A138405 From _Alois P. Heinz_, Jan 17 2023: (Start)
%F A138405 a(n) = 2 * A138431(n).
%F A138405 a(n) = A050997(n) - A001248(n). (End)
%t A138405 a = {}; Do[p = Prime[n]; AppendTo[a, p^5 - p^2], {n, 1, 50}]; a
%o A138405 (PARI) forprime(p=2,1e3,print1(p^5-p^2", ")) \\ _Charles R Greathouse IV_, Jun 16 2011
%o A138405 (Magma) [NthPrime((n))^5 - NthPrime((n))^2: n in [1..30] ]; // _Vincenzo Librandi_, Jun 17 2011
%Y A138405 Cf. A001248, A030078, A050997, A138431.
%K A138405 nonn,easy
%O A138405 1,1
%A A138405 _Artur Jasinski_, Mar 19 2008