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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
CROSSREFS
Sequence in context: A331029 A105949 A302422 * A331832 A032915 A019080
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1998
STATUS
approved

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Last modified April 18 03:33 EDT 2024. Contains 371767 sequences. (Running on oeis4.)