1,1

Table of n, a(n) for n=1..12.

a(4)=10681 as 20681, 11681, 10781 and 10691 are prime

Sequence in context: A041852 A220712 A295916 * A219926 A219739 A228283

Adjacent sequences: A124114 A124115 A124116 * A124118 A124119 A124120

hard,nonn,base

Anton Vrba (antonvrba(AT)yahoo.com), Nov 28 2006

a(11)-a(12) from Donovan Johnson, Nov 24 2010

approved