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 A136040 #10 Aug 28 2015 12:49:02 %S A136040 1,2,3,4,5,6,7,8,9,10,14,16,17,19,21,22,25,26,29,31,41,49,51,52,55,58, %T A136040 59,60,63,65,66,67,69,71,74,77,79,81,82,87,89,108,109,113,114,116,119, %U A136040 122,124,127,129,130,136,137,142,143,145,147,148,151,154,158,159,161,162,163 %N A136040 Classes of the phi iteration for which the smallest number is prime. %C A136040 Rows of A058812 which begin with a prime. The actual primes are in A092873, which is A007755(n+2) for the n in this sequence. %H A136040 T. D. Noe, <a href="/A136040/b136040.txt">Table of n, a(n) for n=1..288</a> %H A136040 T. D. Noe, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL11/Noe/noe080107.html">Primes in classes of the iterated totient function</a>, JIS 11 (2008) 08.1.2 %H A136040 Harold Shapiro, <a href="http://www.jstor.org/stable/2303988">An arithmetic function arising from the phi function</a>, Amer. Math. Monthly, Vol. 50, No. 1 (1943), 18-30. %K A136040 nonn %O A136040 1,2 %A A136040 _T. D. Noe_, Dec 12 2007 %E A136040 Added 63 and 159. - _T. D. Noe_, Nov 18 2008