OFFSET
1,1
COMMENTS
It is conjectured that all numbers in this sequence ends in 1.
All terms known so far are of the form A228455(n) - 4. - M. F. Hasler, Dec 08 2016
EXAMPLE
280743771536011781 is in sequence because 280743771536011781, 280743771536011783, 280743771536011785, 280743771536011787, 280743771536011789 is a set of 5 consecutive odd number where 280743771536011785 is pseudoprime base 2 and others are prime.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Shyam Sunder Gupta, Oct 27 2013
EXTENSIONS
Definition reworded by M. F. Hasler, Dec 08 2016
STATUS
approved