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 A175249 #21 Aug 29 2024 12:15:45
%S A175249 1,5,11,17,19,23,31,41,43,47,59,67,71,73,83,89,97,101,103,109,127,131,
%T A175249 137,139,149,157,163,167,179,191,193,197,211,223,227,229,233,241,251,
%U A175249 257,263,269,277,283,293,307,311,313,331,337,347,353,367,373,379,383,389,401,409,419
%N A175249 Noncomposites (A008578) with nonprime (A018252) subscripts.
%F A175249 a(n) = noncomposite(nonprime(n)) = A008578(A018252(n)).
%e A175249 a(5) = 19 because a(5) = q(b(5)) = q(9) = 19, q = noncomposite, b = nonprime.
%t A175249 Join[{1}, Table[Prime[ResourceFunction["Composite"][n] - 1], {n, 1, 100}]]
%Y A175249 Cf. A008578, A018252, A088982.
%K A175249 nonn
%O A175249 1,2
%A A175249 _Jaroslav Krizek_, Mar 13 2010
%E A175249 a(34)-a(60) from _Terry D. Grant_, Aug 16 2016