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%I #2 Mar 30 2012 17:34:41
%S 7,9,65,4097,16777217,281474976710657,79228162514264337593543950337,
%T 6277101735386680763835789423207666416102355444464034512897,
%U 394020061963944792122790401001436138050797392704654466679482934042457217714972
%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 Clear[a, n];
%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, A178426, A178428.
%K nonn
%O 0,1
%A _Roger L. Bagula_, May 27 2010
%E Definition simplified by the Assoc. Eds. of the OEIS - May 28 2010
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