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Search: id:A000787
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| A000787 |
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Strobogrammatic numbers: the same upside down.
(Formerly M4480 N1897)
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+0
9
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| 0, 1, 8, 11, 69, 88, 96, 101, 111, 181, 609, 619, 689, 808, 818, 888, 906, 916, 986, 1001, 1111, 1691, 1881, 1961, 6009, 6119, 6699, 6889, 6969, 8008, 8118, 8698, 8888, 8968, 9006, 9116, 9696, 9886, 9966, 10001, 10101, 10801, 11011, 11111, 11811, 16091
(list; graph; listen)
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OFFSET
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0,3
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REFERENCES
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The editors, "Strobogrammatic years", Math. Mag., 34 (1961), 184.
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MATHEMATICA
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fQ[n_] := Block[{s = {0, 1, 6, 8, 9}, id = IntegerDigits[n]}, If[ Union[ Join[s, id]] == s && (id /. {6 -> 9, 9 -> 6}) == Reverse[id], True, False]]; Select[ Range[0, 16190], fQ[ # ] &] (* Robert G. Wilson v *)
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CROSSREFS
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Cf. A007597, A057770, A111065.
Sequence in context: A107788 A038289 A079607 this_sequence A006072 A074042 A140478
Adjacent sequences: A000784 A000785 A000786 this_sequence A000788 A000789 A000790
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KEYWORD
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base,nonn,easy
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AUTHOR
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njas
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(at)rgwv.com), Oct 11 2005
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