OFFSET
1,1
EXAMPLE
a(2) = 3803 because 3803 and next prime 3821 are emirps, both with a digital sum of 14. a(3)=1865491 because 1865491 1865509 1865527 are all emirps with digital sum of 34.
CROSSREFS
KEYWORD
base,more,nonn
AUTHOR
Jason Earls, May 19 2002
EXTENSIONS
One more term from Klaus Brockhaus, May 26 2002
a(5)-a(6) from Giovanni Resta, Apr 24 2017
STATUS
approved