0,1

Prime versus probable prime status and proofs are given in the author's table.

P. De Geest, SUPP Reference Table

a(n)=31 -> (17*10^31-71)/99 = 1717171717171717171717171717171.

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A107013 A107012 A102906 this_sequence A097759 A053237 A039378

Adjacent sequences: A062210 A062211 A062212 this_sequence A062214 A062215 A062216

nonn,base,bref

Patrick De Geest (pdg(AT)worldofnumbers.com) and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001.