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A032665 Digit '2' concatenated with a(n) is a prime. 4
3, 9, 11, 23, 27, 29, 33, 39, 41, 51, 57, 63, 69, 71, 77, 81, 83, 93, 111, 113, 129, 131, 137, 141, 143, 153, 161, 179, 203, 207, 213, 221, 237, 239, 243, 251, 267, 269, 273, 281, 287, 293, 297, 309, 311, 333, 339, 341, 347, 351, 357, 371, 377, 381, 383, 389 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Seiichi Manyama, Table of n, a(n) for n = 1..10000

CROSSREFS

Sequence in context: A179867 A032671 A105949 * A032915 A019080 A060141

Adjacent sequences:  A032662 A032663 A032664 * A032666 A032667 A032668

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

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Last modified September 23 17:44 EDT 2017. Contains 292362 sequences.