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 A333969 Squares of terms are the intersection of A025487 and A217584. 1
 1, 12, 60, 1260, 13860, 180180, 277200, 900900, 3628800, 15315300, 28828800, 38880000, 290990700, 373248000, 428828400, 2036934900, 2477260800, 3632428800, 6692786100, 8147739600, 13335840000, 15682867200, 15925248000, 20956320000, 46849502700, 61751289600, 65181916800, 68976230400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS As all terms in A217584 are squares so these list the square roots. Also: Numbers k such that k^2 is the least positive integer having its prime signature and d(k^4)/d(k^2) is an integer. LINKS David A. Corneth, Table of n, a(n) for n = 1..3393 EXAMPLE 12 is in the sequence as 12^2 = 144 and 144^2 has 45 divisors and 144 has 15 divisors and 45/15 = 3 is integer and 12 is in A025487 and so is 144. CROSSREFS Cf. A025487, A217584. Sequence in context: A056388 A056378 A231026 * A076504 A232700 A354882 Adjacent sequences: A333966 A333967 A333968 * A333970 A333971 A333972 KEYWORD nonn AUTHOR David A. Corneth, May 30 2020 STATUS approved

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Last modified January 30 12:01 EST 2023. Contains 359943 sequences. (Running on oeis4.)