0,1

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

P. De Geest, SUPP Reference Table

a(n)=23 -> (91*10^23-19)/99 = 91919191919191919191919.

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A096187 A047471 A050538 this_sequence A111324 A107073 A111211

Adjacent sequences: A062224 A062225 A062226 this_sequence A062228 A062229 A062230

nonn,base

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