OFFSET
1,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..13
FORMULA
a(1) = 1, a(2) = 8, a(n) = Product_{i=1..n-1} a(i), n >= 3.
a(1) = 1, a(2) = 8, a(n) = A001018(2^(n-3)) = 8^(2^(n-3)), n >= 3.
a(1) = 1, a(2) = 8, a(3) = 8, a(n) = (a(n-1))^2, n >= 4.
a(n) = 8^A166444(n). [uncovered by sequencedb.net]. - R. J. Mathar, Jun 30 2021
MATHEMATICA
a[1]:= 1; a[2]:= 8; a[n_]:= Product[a[j], {j, 1, n-1}]; Table[a[n], {n, 1, 12}] (* G. C. Greubel, Oct 19 2018 *)
PROG
(PARI) {a(n) = if(n==1, 1, if(n==2, 8, prod(j=1, n-1, a(j))))};
for(n=1, 10, print1(a(n), ", ")) \\ G. C. Greubel, Oct 19 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Jaroslav Krizek, Sep 17 2009
STATUS
approved