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 A270798 #17 Apr 03 2016 22:16:32 %S A270798 5281,5591,6211,6271,8581,8861,9011,9661,10391,10691,11621,12011, %T A270798 12911,13451,15901,19001,19801,20521,20921,21481,21701,22901,22921, %U A270798 23371,26141,27241,27481,28001,28711,29131,30971,31321,31511,32341,32381,34211,38261,38611 %N A270798 Hyperartiads. %C A270798 Artiads (A001583) for which 5 is a quintic residue. [Lehmer] - _Eric M. Schmidt_, Apr 01 2016 %H A270798 Eric M. Schmidt, <a href="/A270798/b270798.txt">Table of n, a(n) for n = 1..1000</a> %H A270798 E. Lehmer, <a href="http://dx.doi.org/10.1016/0022-247X(66)90145-4">Artiads characterized</a>, J. Math. Anal. Appl. 15 1966 118-131. Beware errors! %H A270798 E. Lehmer, <a href="/A001583/a001583b.pdf">Artiads characterized</a>, J. Math. Anal. Appl. 15 1966 118-131 [annotated and corrected scanned copy] %o A270798 (Sage) def is_hyperartiad(n) : return n % 10 == 1 and is_prime(n) and 5.powermod((n-1)//5, n) == 1 and fibonacci((n-1)//5) % n == 0 # _Eric M. Schmidt_, Apr 01 2016 %Y A270798 Cf. A001583. %K A270798 nonn,easy %O A270798 1,1 %A A270798 _N. J. A. Sloane_, Mar 31 2016 %E A270798 Extended and corrected by _Eric M. Schmidt_, Apr 01 2016