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 A206462 #19 Oct 30 2018 10:31:02 %S A206462 2,13,19,37,67,89,103,109,127,163,193,199,211,229,307,379,389,397,449, %T A206462 463,467,479,487,499,509,613,643,661,683,701,719,739,757,769,797,859, %U A206462 877,883,887,911,929,937,967,983,997,1009,1093,1109,1163,1201,1237,1279 %N A206462 Primes p such that p + nextprime(p) is a squarefree number (A005117). %H A206462 Reinhard Zumkeller, <a href="/A206462/b206462.txt">Table of n, a(n) for n = 1..10000</a> %F A206462 a(n) + nextprime(a(n)) = A206329(n). %F A206462 A008966(A001043(A049084(a(n)))) = 1. [_Reinhard Zumkeller_, Feb 08 2012] %e A206462 13 + 17 = 30 = A206329(2). %t A206462 Prime[Select[Range[200], Abs[MoebiusMu[Prime[#] + Prime[# + 1]]] == 1 &]] (* _Alonso del Arte_, Feb 08 2012 *) %o A206462 (Haskell) %o A206462 a206462 n = a206462_list !! (n-1) %o A206462 a206462_list = map (a000040 . (+ 1)) $ %o A206462 elemIndices 1 $ map a008966 a001043_list %o A206462 -- _Reinhard Zumkeller_, Feb 08 2012 %Y A206462 Cf. A001043, A001358, A005117, A206329. %K A206462 nonn %O A206462 1,1 %A A206462 _Zak Seidov_, Feb 07 2012