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 A269327 #22 Sep 08 2022 08:46:15
%S A269327 49,343,16807,823543,1977326743,96889010407,232630513987207,
%T A269327 11398895185373143,27368747340080916343,3219905755813179726837607,
%U A269327 157775382034845806615042743,18562115921017574302453163671207,44567640326363195900190045974568007
%N A269327 a(n) = 7^prime(n).
%F A269327 a(n) = 7^A000040(n).
%F A269327 Sum_{n>=1} 1/a(n) = A132822. - _Amiram Eldar_, Aug 11 2020
%e A269327 The second prime is 3, hence a(2) = 7^3 = 343.
%e A269327 The third prime is 5, hence a(3) = 7^5 = 16807.
%p A269327 A269327:=n->7^ithprime(n): seq(A269327(n), n=1..20); # _Wesley Ivan Hurt_, Mar 07 2016
%t A269327 7^Prime[Range[20]] (* _Alonso del Arte_, Feb 23 2016 *)
%o A269327 (Magma) [7^p: p in PrimesUpTo(45)]; // _Vincenzo Librandi_, Feb 25 2016
%o A269327 (PARI) a(n) = 7^prime(n); \\ _Altug Alkan_, Mar 04 2016
%Y A269327 Cf. A000040, A000420, A034785, A053810, A057901, A057902, A132822.
%K A269327 nonn,easy
%O A269327 1,1
%A A269327 _Emre APARI_, Feb 23 2016