1,1

a(3)=21 because it is the first integer divisible by 7 which is obtained from the beginning of the unused part of the decimal extension of square root 2.

Cf. A099205.

Sequence in context: A105707 A157427 A003905 this_sequence A040183 A022348 A006662

Adjacent sequences: A099200 A099201 A099202 this_sequence A099204 A099205 A099206

nonn

Serhat Sevki Dincer (mesti_mudam(AT)yahoo.com), Oct 04 2004