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A178424
17 followed by the base-18 Fermat numbers.
0
17, 19, 325, 104977, 11019960577, 121439531096594251777, 14747559712960682275277163588165279154177, 217490517487340961382742893166950969620647214876916403331613367885781133978238
OFFSET
0,1
FORMULA
a(n)= 18^(2^(n-1))+1, n>0.
a(n)= 2+ product_{i<n} a(i).
a(n)= 1 + (a(n-1)-1)^2, n>1.
MATHEMATICA
Clear[a, n];
a[0] := 17;
a[n_] := a[n] = Product[a[i], {i, 0, n - 1}] + 2;
Table[a[n], {n, 0, 10}]
CROSSREFS
Sequence in context: A132242 A162873 A174379 * A068387 A372220 A134539
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, May 27 2010
EXTENSIONS
Edited by the Assoc. Eds. of the OEIS, Jul 20 2010
STATUS
approved