OFFSET
1,1
COMMENTS
See A137815 for general comments and references about "year numbers". This is the subsequence of elements of A137815 divisible by a biquadrateful number, i.e. its intersection with A046101 (numbers divisible by the 4th power of some prime). As such, it is of course also a subsequence of A137817 and a fortiori of A137816.
There are only 28 such numbers below 10^8.
LINKS
Donovan Johnson, Table of n, a(n) for n = 1..500
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved