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 A074870 #7 Jan 31 2025 23:44:56 %S A074870 4,6,12,15,12,21,56,18,30,473,60,26,42,30,176,34,198,4883,60,42,154, %T A074870 69,72,50,754,81,56,667,60,93,64,99,102,105,72,111,76,195,120,205,462, %U A074870 86,1364,225,138,3337,144,2303,150,102,260,1537,108,165,1624,399,754 %N A074870 Smallest interprimes of the form n*prime. %C A074870 Interprimes of the form n*prime are in A075277-A075296 ( n = 2 - 21 ). Case n=1 is impossible. First 20 terms in the sequence are first terms in A075277-A075296. %e A074870 a(8)=56 because 56 is the smallest interprime of the form 8*prime. %Y A074870 Cf. A075277-A075296. %K A074870 easy,nonn %O A074870 2,1 %A A074870 _Zak Seidov_, Sep 12 2002 %E A074870 a(50) corrected by _Sean A. Irvine_, Jan 31 2025