OFFSET
1,1
COMMENTS
McDaniel shows the sequence is infinite.
LINKS
N. J. A. Sloane, Table of n, a(n) for n = 1..12643
Wayne L. McDaniel, Some pseudoprimes and related numbers having special forms, Math. Comp. 53:187 (1989), 407-409.
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Sep 02 2018
STATUS
approved