A180066 Smallest prime factor of 2-strong pseudoprimes.

23, 29, 37, 31, 53, 7, 13, 127, 157, 7, 97, 5, 61, 53, 149, 151, 229, 137, 157, 103, 43, 41, 157, 233, 151, 277, 13, 131, 313, 277, 11, 233, 157, 359, 499, 13, 79, 431, 5, 101, 397, 661, 307, 479, 313, 331, 13, 251, 11, 601, 103, 1093, 449, 409, 733, 571, 499, 673, 829

Offset

1,1

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Index entries for sequences related to pseudoprimes

Formula

a(n) = A020639(A001262(n)).

Example

The 8th pseudoprime, 42799, is divisible by 127.

Crossrefs

Sequence in context: A153631 A082943 A061754 * A353286 A101784 A101802

Adjacent sequences: A180063 A180064 A180065 * A180067 A180068 A180069

Keyword

nonn

Author

Kevin Batista (kevin762401(AT)yahoo.com), Aug 09 2010

Extensions

b-file and edits from Charles R Greathouse IV, Aug 28 2010

Status

approved