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 A178426 11 followed by the Fermat numbers A152585. 2
 11, 13, 145, 20737, 429981697, 184884258895036417, 34182189187166852111368841966125057, 1168422057627266461843148138873451659428421700563161428957815831003137 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS If a(0)=3, the recursion formula gives A000215. LINKS FORMULA a(0)=11. a(n)= 2+product{i=0..n-1} a(i). MATHEMATICA Clear[a, n]; a[0] := 11; a[n_] := a[n] = Product[a[i], {i, 0, n - 1}] + 2; Table[a[n], {n, 0, 10}] CROSSREFS Cf. A000215, A178427, A178428. Sequence in context: A108090 A136296 A094621 * A252170 A144375 A140969 Adjacent sequences: A178423 A178424 A178425 * A178427 A178428 A178429 KEYWORD nonn AUTHOR Roger L. Bagula, May 27 2010 EXTENSIONS Definition simplified by the Assoc. Eds. of the OEIS - May 28 2010 STATUS approved

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Last modified December 7 17:25 EST 2022. Contains 358668 sequences. (Running on oeis4.)