OFFSET
1,2
FORMULA
a(n) = prime(a(n-1))^4, for n>=2.
EXAMPLE
For n=3, the complete quaternary tree of 3 levels is
7890481
/ / \ \ a(4) = prime(16)^4
16 16 16 16 = 7890481
// \\ // \\ // \\ // \\
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
PROG
(PARI) a(n) = my(ret=1); for(i=2, n, ret=prime(ret)^4); ret;
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Kevin Ryde, Jul 27 2022
STATUS
approved