

A178426


11 followed by the Fermat numbers A152585.


2




OFFSET

0,1


COMMENTS

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


LINKS

Table of n, a(n) for n=0..7.


FORMULA

a(0)=11. a(n)= 2+product{i=0..n1} 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



