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 A354140 #8 Jun 02 2025 15:25:24 %S A354140 1,3,5,6,8,10,11,12,13,16,17,18,20,21,22,23,24,25,26,27,28,30,33,34, %T A354140 35,36,37,38,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58, %U A354140 61,62,64,66,67,68,69,70,71,72,73,74,75,76,77,78,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,100,101,102,103,104,105,106,107,108,109 %N A354140 a(n) = index where prime(n) appears in A353730. %C A354140 Here prime(n) means the n-th prime in 2, 3, 5, 7, ..., not the n-th term of A353730 that happens to be a prime. %e A354140 A353730(8) = 11 = prime(5), so a(5) = 8. %Y A354140 Cf. A353730, A353734. %K A354140 nonn %O A354140 1,2 %A A354140 _N. J. A. Sloane_, May 18 2022