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 A282705 #24 Aug 13 2019 13:17:10 %S A282705 3,11,59,419,31,19,1021019,19399379,41,229,173,14841476269619,919, %T A282705 21519583,53,461,151,101,281,1115881660253397921934830779, %U A282705 158616683341,6435289534681345815798169108259,271,300423271 %N A282705 Smallest prime factor of A282704. %C A282705 By construction, a(n) == 3 (mod 4) and a(n) > prime(n). %C A282705 a(98) requires the factorization of a 215-digit composite; a(99)-a(115) = 7879, 4421, 1949, 549767, 673759959337, 20051, 29383, 661, 37712121832769, 1481189, 14344471, 7136807, 991, 62539, 2879, 205598683, 10234232245987. - _Hans Havermann_, Mar 24 2017 %D A282705 T. M. Apostol, Introduction to Analytic Number Theory, Springer-Verlag, 1976, page 147. %H A282705 Hans Havermann, <a href="/A282705/b282705.txt">Table of n, a(n) for n = 1..97</a> %H A282705 factordb.com, <a href="http://factordb.com/index.php?query=2*98%23%23-1">Status of A282704(98)</a>. %Y A282705 Cf. A282704, A282706. %K A282705 nonn %O A282705 1,1 %A A282705 _N. J. A. Sloane_, Feb 26 2017 %E A282705 Corrected and extended by _Hans Havermann_, Mar 12 2017