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 A380146 #8 Jan 23 2025 22:02:01 %S A380146 1,2,4,6,12,24,30,48,60,120,210,240,420,480,840,1680,3360,6720,13440, %T A380146 26880,36960,53760,73920,107520,147840,215040,295680,591360,960960, %U A380146 1182720,1921920,2365440,3843840,4730880,7687680,9461760,15375360,30750720,61501440,123002880 %N A380146 Numbers that set records in A113901. %C A380146 All terms in this sequence are numbers of least prime signature (A025487). Therefore it is easier to search for new terms in the product of A061394 (omega of least prime signature) and A036041 (bigomega of least prime signature). Similar to but ultimately different from A378630. Terms appear to be products of primorials (A002110) with powers of 2 (A000079), and thus are never divisible by the square of an odd prime. %e A380146 omega(60) = 3 and bigomega(60) = 4; their product is 12. This product is larger than that for any smaller natural number, so 60 is a term of this sequence. %Y A380146 Cf. A000079, A001221, A001222, A002110, A025487, A036041, A061394, A113901, A378630. %K A380146 nonn %O A380146 1,2 %A A380146 _Hal M. Switkay_, Jan 13 2025