

A063068


Smallest number expressible as (a^21)(b^21) in at least n distinct ways [with b>=a>1].


6




OFFSET

1,1


COMMENTS

Note that each term is a multiple of the preceding term (at least up to a(5)).


LINKS



EXAMPLE

a(4)=241920 since 241920 =(4^21)(127^21) =(7^21)(71^21) =(9^21)(55^21) =(17^21)(29^21)


CROSSREFS



KEYWORD

more,nonn


AUTHOR



STATUS

approved



