login
A358541
a(n) is the smallest number with exactly n divisors that are centered n-gonal numbers.
3
20, 325, 912, 43771, 234784, 11025, 680680, 9143308361, 2470852896
OFFSET
3,1
COMMENTS
Any subsequent terms are > 10^10. - Lucas A. Brown, Dec 24 2022
EXAMPLE
a(5) = 912 because 912 has 5 centered pentagonal divisors {1, 6, 16, 76, 456} and this is the smallest such number.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Ilya Gutkovskiy, Nov 21 2022
EXTENSIONS
a(10)-a(11) from Martin Ehrenstein, Dec 04 2022
STATUS
approved