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 A181804 List of numbers that are LCMs of some set of highly composite numbers (A002182). 5
 1, 2, 4, 6, 12, 24, 36, 48, 60, 72, 120, 144, 180, 240, 360, 720, 840, 1260, 1680, 2520, 5040, 7560, 10080, 15120, 20160, 25200, 27720, 30240, 45360, 50400, 55440, 60480, 75600, 83160, 90720, 100800, 110880, 151200, 166320, 181440, 221760, 226800, 277200 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Numbers n such that A181801(n) is higher than A181801(d) for any proper divisor d of n. Also, numbers n such that row n of A181802 is identical to no previous row of A181802. A002182 is a proper subsequence of this sequence. 72 is the first LCM of some set of highly composite numbers that is not itself highly composite. LINKS A. Flammenkamp, List of the first 1200 highly composite numbers Eric Weisstein's World of Mathematics, Highly composite number Eric Weisstein's World of Mathematics, Least Common Multiple (LCM) Eric Weisstein's World of Mathematics, Proper Divisor EXAMPLE 1, 2, 4, 6, 12, 24 and 36 are all highly composite numbers, and their least common multiple (LCM) is 72.  Hence, 72 is a member of the sequence. CROSSREFS A181805 gives the number of highly composite divisors of a(n), or A181801(a(n)). Subsequence of A025487. Includes all members of A181806. Sequence in context: A056795 A141420 A141551 * A094348 A242298 A002182 Adjacent sequences:  A181801 A181802 A181803 * A181805 A181806 A181807 KEYWORD nonn AUTHOR Matthew Vandermast, Nov 27 2010 STATUS approved

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Last modified October 22 07:48 EDT 2019. Contains 328315 sequences. (Running on oeis4.)