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A178426 11 followed by the Fermat numbers A152585. 2

%I

%S 11,13,145,20737,429981697,184884258895036417,

%T 34182189187166852111368841966125057,

%U 1168422057627266461843148138873451659428421700563161428957815831003137

%N 11 followed by the Fermat numbers A152585.

%C If a(0)=3, the recursion formula gives A000215.

%F a(0)=11. a(n)= 2+product{i=0..n-1} a(i).

%t Clear[a, n];

%t a[0] := 11;

%t a[n_] := a[n] = Product[a[i], {i, 0, n - 1}] + 2;

%t Table[a[n], {n, 0, 10}]

%Y Cf. A000215, A178427, 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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Last modified July 12 09:35 EDT 2020. Contains 335657 sequences. (Running on oeis4.)