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 A379811 #6 Feb 16 2025 21:55:19 %S A379811 7,23,47,79,123,223,325,364,630,910,1034,1310,1610,1857,2219,2819, %T A379811 3378,3979,4499,4773,5057,5790,6899,7581,9226,9429,10225,11459,12329, %U A379811 12781,15890,16910,18506,19887,22211,22514,23738,27231,27899,29602,32055,32418,37255,38031 %N A379811 a(n) = index of 2*prime(n) in A381019. %e A379811 A381019(47) = 10 = 2*prime(3), so a(3) = 47. %Y A379811 Cf. A381019, A381118. %K A379811 nonn %O A379811 1,1 %A A379811 _N. J. A. Sloane_, Feb 15 2025 %E A379811 More terms from _Michael De Vlieger_, Feb 15 2025.