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 A077665 #14 Aug 04 2015 01:55:01 %S A077665 2,5,7,11,11,23,15,23,22,33,23,47,27,45,43,47,35,71,39,69,58,69,47,95, %T A077665 56,81,67,93,59,139,63,95,86,105,86,143,75,117,101,139,83,187,87,139, %U A077665 128,141,95,191,106,173,131,163,107,215,129,185,146,177,119,283,123,189 %N A077665 Final term of n-th row of A077664. %C A077665 a(p) = 2p+1, p is a prime. a(2^n) = 3*2^n -1. %C A077665 a(n) also equals the (n+phi(n))th integer from among those positive integers coprime to n, where phi(n) = A000010(n). a(n) also equals n + (the n-th integer from among those positive integers coprime to n) = n + A069213(n). - _Leroy Quet_, Apr 12 2007 %H A077665 Reinhard Zumkeller, <a href="/A077665/b077665.txt">Table of n, a(n) for n = 1..1000</a> %o A077665 (Haskell) %o A077665 a077665 = last . a077664_row -- _Reinhard Zumkeller_, Aug 03 2015 %Y A077665 Cf. A077664, A077666. %K A077665 nonn %O A077665 1,1 %A A077665 _Amarnath Murthy_, Nov 14 2002 %E A077665 More terms from _Sascha Kurz_, Jan 03 2003