A179121 Variant of Sylvester's sequence: a(n + 1) = a(n)^2 - a(n) + 1, with a(1) = 18

18, 307, 93943, 8825193307, 77884036897092402943, 6065923203387650816975131277148782658307, 36795424309396699379852983331957135547989414580911143782409880284213748733447943

Offset

1,1

References

Mohammad K. Azarian, Sylvester's Sequence and the Infinite Egyptian Fraction Decomposition of 1, Problem 958, College Mathematics Journal, Vol. 42, No. 4, September 2011, p. 330. Solution published in Vol. 43, No. 4, September 2012, pp. 340-342

Links

Table of n, a(n) for n=1..7.

Markus Tervooren, Factorizations of Silvester/Euclid sequence 18

Crossrefs

Cf. A144779, A144780, A144781, A144782, A144783, A144784, A144785, A179090, A179091, A179092, A179093

Sequence in context: A170699 A170737 A091045 * A226298 A368537 A321511

Adjacent sequences: A179118 A179119 A179120 * A179122 A179123 A179124

Keyword

nonn

Author

Ivan Panchenko, Jun 30 2010

Status

approved