A068216 a(n) is the smallest n-digit pseudoprime (to base 2).

341, 1105, 10261, 101101, 1004653, 10004681, 100017223, 1001152801, 10000321321, 100004790097, 1000001376901, 10000130243671, 100000105970311, 1000000191735161, 10000006286491369, 100000010102756401, 1000000114865704261, 10000000494514450733

Offset

3,1

Links

Table of n, a(n) for n=3..20.

P. De Geest, Smallest n-digit pseudoprimes (base 2)

Index entries for sequences related to pseudoprimes

Crossrefs

Cf. A001567, A067845, A001262, A062568, A062852.

Sequence in context: A367319 A083876 A348258 * A038473 A276733 A050217

Adjacent sequences: A068213 A068214 A068215 * A068217 A068218 A068219

Keyword

nonn,base

Author

Patrick De Geest and Shyam Sunder Gupta, Feb 21 2002

Extensions

One more term from Farideh Firoozbakht, Jan 10 2007

More terms from Jens Kruse Andersen, May 11 2008

Offset corrected by Arkadiusz Wesolowski, Dec 14 2011

Status

approved