A164824 Lucas pseudoprimes whose reversal is prime.

10877, 97921, 113573, 163081, 186961, 302101, 1106327, 1149851, 1317121, 1392169, 1533601, 1653601, 1690501, 3218801, 3338221, 3399527, 3967201, 7405201, 7640137, 7678321, 9264097, 9439201, 9532033, 9582145, 10237921

Offset

1,1

Links

Table of n, a(n) for n=1..25.

Formula

A005845 INTERSECTION (A006567 UNION A007500). {n in A005845 such that A004086(n) is in A000040}. {n such that n | (L_n - 1), where n is composite and L_n = Lucas numbers A000032, and R(n) is prime}.

Example

a(1) = 10877 = 73 * 149 because that is the 8th Lucas pseudoprime, and its reversal 77801 is prime.

Crossrefs

Cf. A000040, A004086, A005845, A006567, A007500.

Sequence in context: A334003 A214243 A250896 * A329196 A083513 A084277

Adjacent sequences: A164821 A164822 A164823 * A164825 A164826 A164827

Keyword

easy,nonn,base,less

Author

Jonathan Vos Post, Aug 27 2009

Extensions

More terms from R. J. Mathar, Sep 27 2009

Status

approved