OFFSET
1,12
LINKS
Eric Weisstein's World of Mathematics, Strong Pseudoprime
Jan Feitsma and William Galway, Tables of pseudoprimes and related data
EXAMPLE
a(12)=3 since 2047, 3277 and 4033 are the 2-SPSPs less than 4096.
CROSSREFS
KEYWORD
nonn
AUTHOR
Charles R Greathouse IV, Dec 03 2005
EXTENSIONS
a(24)-a(64) from Charles R Greathouse IV, Jan 28 2011, based on the calculations of Jan Feitsma.
a(1)=...=a(10)=0 prepended by Max Alekseyev, Apr 23 2013
STATUS
approved