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 A145750 Primes which become emirps when rotated by 180 degrees on a digital clock display. 1
 661, 1061, 1091, 1181, 1601, 1811, 1901, 6011, 6991, 10061, 10091, 10861, 11681, 16001, 16981, 19001, 19961, 60601, 60611, 69001, 106861, 108161, 108881, 109891, 110881, 116881, 116911, 118081, 118861, 119101, 119611, 160861, 161611, 168601, 169691 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The sequence contains all bemirps A048895. Subsequence of A057770. [R. J. Mathar, Apr 05 2009] LINKS Table of n, a(n) for n=1..35. EXAMPLE 1109 is a prime. After 2D rotation it is 6011, which is prime. However, 6011 is not an emirp because 1106 is not prime. So 1109 is not in the sequence. CROSSREFS Sequence in context: A252401 A171394 A243886 * A243889 A105978 A208180 Adjacent sequences: A145747 A145748 A145749 * A145751 A145752 A145753 KEYWORD nonn,base AUTHOR Lekraj Beedassy, Apr 04 2009 EXTENSIONS 1109 removed, 6011 inserted etc. by R. J. Mathar, Apr 05 2009 STATUS approved

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Last modified September 26 04:29 EDT 2023. Contains 365653 sequences. (Running on oeis4.)