OFFSET
3,1
COMMENTS
Any subsequent terms are > 2 * 10^9. - Lucas A. Brown, Dec 24 2022
LINKS
Lucas A. Brown, Python program.
Eric Weisstein's World of Mathematics, Pyramidal Number
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