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Search: id:A018847
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| A018847 |
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Strobogrammatic primes: the same upside down (calculator-style numerals). |
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+0
4
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| 2, 5, 11, 101, 151, 181, 619, 659, 6229, 10501, 12821, 15551, 16091, 18181, 19861, 60209, 60509, 61519, 61819, 62129, 116911, 119611, 160091, 169691, 191161, 196961, 605509, 620029, 625529, 626929, 650059, 655559, 656959, 682289, 686989, 688889
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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lst = {}; fQ[n_] := Block[{allset = {0, 1, 2, 5, 6, 8, 9}, id = IntegerDigits@n}, Union@ Join[id, allset] == allset && Reverse[id /. {6 -> 9, 9 -> 6}] == id]; Do[ If[ PrimeQ@n && fQ@n, AppendTo[lst, n], {n, 700000}] (* Robert G. Wilson v (rgwv(at)rgwv.com), Feb 27 2007 *)
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CROSSREFS
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Cf. A007597.
Sequence in context: A087185 A127010 A131480 this_sequence A134996 A134998 A078790
Adjacent sequences: A018844 A018845 A018846 this_sequence A018848 A018849 A018850
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KEYWORD
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nonn,base
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AUTHOR
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David W. Wilson (davidwwilson(AT)comcast.net)
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