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 A037054 #19 Jul 21 2025 05:29:10
%S A037054 1,6,5,187,1242,9682,86538,733339,5821735,56196114,503193257,
%T A037054 4161915701,41621368333,383118399789,3549047966306,33056584174792,
%U A037054 309353882119895,2651938403956789,27417323062119921,27417323062119920,2461813897281353902,23422580231698331842
%N A037054 a(n)-th prime is the smallest prime containing exactly n 1's.
%H A037054 Andrew R. Booker, <a href="https://t5k.org/nthprime/">The Nth Prime Page</a>.
%H A037054 Kim Walisch, <a href="https://github.com/kimwalisch/primecount">primecount</a>, Fast prime counting function library.
%F A037054 a(n) = A000720(A037055(n)). - _Amiram Eldar_, Jul 20 2025
%t A037054 (* see A037055 for f *) PrimePi[ Table[ f[n, 1], {n, 1, 13}]]
%Y A037054 Cf. A000720, A037055, A034388.
%Y A037054 Cf. A037052, A037056, A037058, A037060, A037062, A037064, A037066, A037068, A037070.
%K A037054 nonn,base,hard
%O A037054 0,2
%A A037054 _Patrick De Geest_, Jan 04 1999
%E A037054 a(0)=1 prepended by _Sean A. Irvine_, Dec 06 2020
%E A037054 a(14)-a(21) calculated using Kim Walisch's primecount and added by _Amiram Eldar_, Jul 20 2025