%I #19 May 23 2024 16:23:36
%S 7,9,65,4097,16777217,281474976710657,79228162514264337593543950337,
%T 6277101735386680763835789423207666416102355444464034512897
%N 7 followed by the Fermat numbers A152581.
%C If a(0)=3, the recursion formula gives A000215.
%F a(0)=7. a(n) = 2 + Product_{i=0..n-1} a(i).
%t a[0] := 7;
%t a[n_] := a[n] = Product[a[i], {i, 0, n - 1}] + 2;
%t Table[a[n], {n, 0, 10}]
%Y Cf. A000215, A152581, A178426, A178428.
%K nonn,less
%O 0,1
%A _Roger L. Bagula_, May 27 2010
%E Definition simplified by the Assoc. Eds. of the OEIS - May 28 2010
%E Incorrect a(8) removed by _Georg Fischer_, May 22 2024