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 A064783 #10 Jan 02 2021 04:50:42 %S A064783 30,60,180,210,360,420,840,900,1080,1260,1680,1800,2160,2310,2520, %T A064783 3360,3600,4620,5400,6300,6480,6720,7200,7560,9240,10800,12600,12960, %U A064783 13440,13860,15120,18480,21600,25200,26880,27000,27720,30030,32400,36960 %N A064783 Least prime signature numbers that are not a Jordan-Polya number. %H A064783 Amiram Eldar, <a href="/A064783/b064783.txt">Table of n, a(n) for n = 1..10000</a> %e A064783 a(1)= 30 since 30 is a least prime signature (cf. A025487) but is not the product of factorial numbers (cf. A001013). %Y A064783 Cf. A000142, A001013, A025487. %K A064783 easy,nonn %O A064783 1,1 %A A064783 _Alford Arnold_, Oct 19 2001 %E A064783 More terms from _Naohiro Nomoto_ and _Don Reble_, Oct 21 2001 %E A064783 Offset corrected by _Amiram Eldar_, Jan 02 2021