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A028988 Repdigit + 1 is prime (next term is 22...2 (36 digits)). 14
1, 2, 4, 6, 22, 66, 88, 222, 666666, 22222222, 66666666, 666666666, 22222222222, 66666666666, 88888888888888, 88888888888888888, 66666666666666666666, 66666666666666666666666, 88888888888888888888888888888888888 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

LINKS

P. De Geest, Repdigits: WONplate 83

CROSSREFS

Cf. A010785.

Sequence in context: A176652 A152482 A045960 * A172451 A086172 A141526

Adjacent sequences:  A028985 A028986 A028987 * A028989 A028990 A028991

KEYWORD

nonn,base

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com)

EXTENSIONS

Offset corrected by Arkadiusz Wesolowski, Aug 14 2011

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.