A090154 Primes of the form identical digits preceded by a 6.

61, 67, 677, 67777, 611111, 61111111, 67777777777, 67777777777777, 61111111111111111111111111, 67777777777777777777777777, 61111111111111111111111111111111

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..23

Mathematica

Select[ FromDigits /@ Flatten[ Table[ PadRight[{6}, i, # ] & /@ {1, 2, 3, 4, 5, 6, 7, 8, 9}, {i, 2, 100}], 1], PrimeQ[ # ] &]

Crossrefs

Sequence in context: A062673 A284291 A045712 * A039390 A043213 A043993

Adjacent sequences: A090151 A090152 A090153 * A090155 A090156 A090157

Keyword

nonn,base

Author

Robert G. Wilson v, Nov 22 2003

Status

approved