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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
12
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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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N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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 A167621 A006072 A074042
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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N. J. A. Sloane (njas(AT)research.att.com).
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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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