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 A144731 #8 Jan 26 2023 12:12:14 %S A144731 29,197,2549,48413,1597597,55915861,2012970961,86557751281, %T A144731 4154772061441,228512463379201,13482235339372801,835898591041113601, %U A144731 72723177420576883201,9381289887254417932801 %N A144731 Primes arising in A144730. %Y A144731 Cf. A046966, A046972, A144717, A144718, A144722, A144723, A144724, A144725, A144726, A144727, A144728, A144729, A144730. %K A144731 nonn %O A144731 1,1 %A A144731 _Artur Jasinski_, Sep 19 2008; corrected Sep 19 2008 %E A144731 Typo in definition corrected by _Arkadiusz Wesolowski_, Aug 22 2011