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 A065702 #9 Oct 17 2019 16:39:32 %S A065702 378,1068,24390,29220,32118,56130,70620,74760,77658,82350,96978, %T A065702 100980,110640,114228,132858,152040,177018,183090,186678,214830, %U A065702 253608,282588,290040,319158,342480,345378,374358,388710,406788,418380,428040,442530,463230,463920,477720 %N A065702 Values of m such that N = (am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,69. %H A065702 Amiram Eldar, <a href="/A065702/b065702.txt">Table of n, a(n) for n = 1..10000</a> %F A065702 am+1, bm+1, cm+1 are primes and am|(N-1), bm|(N-1), cm|(N-1). %t A065702 CarmichaelNbrQ[n_] := ! PrimeQ@ n && Mod[n, CarmichaelLambda@ n] == 1; Select[ Range@ 500000, PrimeQ[# + 1] && PrimeQ[2# + 1] && PrimeQ[69# + 1] && CarmichaelNbrQ[(# + 1)(2# + 1)(69# + 1)] &] (* _Robert G. Wilson v_, Aug 23 2012 *) %Y A065702 Cf. A064238-A064262, A065695-A065703, A087788. %K A065702 nonn %O A065702 1,1 %A A065702 Harvey Dubner (harvey(AT)dubner.com), Nov 14 2001