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 A072055 #30 Mar 24 2023 02:50:25 %S A072055 5,7,11,15,23,27,35,39,47,59,63,75,83,87,95,107,119,123,135,143,147, %T A072055 159,167,179,195,203,207,215,219,227,255,263,275,279,299,303,315,327, %U A072055 335,347,359,363,383,387,395,399,423,447,455,459,467,479 %N A072055 a(n) = 2*prime(n)+1. %H A072055 Reinhard Zumkeller, <a href="/A072055/b072055.txt">Table of n, a(n) for n = 1..10000</a> %H A072055 R. P. Boas & N. J. A. Sloane, <a href="/A005381/a005381.pdf">Correspondence, 1974</a> %F A072055 a(n) = A089241(n)-1. %t A072055 2*Prime[Range[60]]+1 (* _Harvey P. Dale_, Mar 31 2011 *) %o A072055 (Haskell) %o A072055 a072055 = (+ 1) . (* 2) . a000040 -- _Reinhard Zumkeller_, Oct 10 2013 %Y A072055 Cf. A000040, A005385, A023589, A023590, A023591, A023592, A023593, A072059, A023595, A072060, A072056, A072057, A072058, A072192, A165286, A278230. %Y A072055 One less than A089241. After the initial term equal to A166496. %Y A072055 Row 4 of A286625, column 4 of A286623. %K A072055 nonn %O A072055 1,1 %A A072055 _Reinhard Zumkeller_, Jun 11 2002