**Prime sums of three Fermat numbers; or, primes of form 2^2^x + 2^2^y + 5.**

*11, 13, 23, 37, 263, 277, 65543, 65557, 429503283*

*2 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

Links to OEIS content are included according to The OEIS End-User License Agreement .