OFFSET
1,2
COMMENTS
An estimate for a(7) is 7.304058*10^55. - Hugo Pfoertner, Jul 26 2022
FORMULA
a(n) = prime(a(n-1))^2, for n>=2.
EXAMPLE
For n=3, the complete binary tree of 3 levels is
49
/ \ a(3) = prime(4)^2
4 4 = 49
/ \ / \
1 1 1 1
PROG
(PARI) a(n) = my(ret=1); for(i=2, n, ret=prime(ret)^2); ret;
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Kevin Ryde, Jul 26 2022
EXTENSIONS
a(6) from Rémy Sigrist, Jul 26 2022
STATUS
approved