1,1

a(4) = 9439 because the largest 4-digit prime quadruplet is {9431, 9433, 9437, 9439}.

Cf. A120120.

Sequence in context: A041684 A157165 A067621 this_sequence A139194 A005535 A136022

Adjacent sequences: A135559 A135560 A135561 this_sequence A135563 A135564 A135565

base,more,nonn

Julien Peter Benney (jpbenney(AT)gmail.com), Feb 23 2008