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URL: https://oeis.org/A358540

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A358540
a(n) is the smallest number with exactly n divisors that are n-gonal pyramidal numbers.
3
56, 140, 1440, 11550, 351120, 41580, 742560, 29279250, 8316000, 72348396120, 3386892600, 578918340
OFFSET
3,1
COMMENTS
Any subsequent terms are > 2 * 10^9. - Lucas A. Brown, Dec 24 2022
EXAMPLE
a(5) = 1440 because 1440 has 5 pentagonal pyramidal divisors {1, 6, 18, 40, 288} and this is the smallest such number.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ilya Gutkovskiy, Nov 21 2022
EXTENSIONS
a(11)-a(13) from Martin Ehrenstein, Dec 02 2022
a(14) from Lucas A. Brown, Dec 19 2022
STATUS
approved