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Search: id:A007284
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| A007284 |
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Horizontally symmetric numbers.
(Formerly M4477)
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+0
2
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| 0, 1, 3, 8, 10, 11, 13, 18, 30, 31, 33, 38, 80, 81, 83, 88, 100, 101, 103, 108, 110, 111, 113, 118, 130, 131, 133, 138, 180, 181, 183, 188, 300, 301, 303, 308, 310, 311, 313, 318, 330, 331, 333, 338, 380, 381, 383, 388, 800, 801, 803, 808, 810, 811, 813, 818
(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 and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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FORMULA
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Numbers using only digits 0, 1, 3 and 8.
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PROGRAM
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(PARI) \Same numbers flipped over flipover(n) = { local(flag, x, j, sx, v, d); for(x=0, n, sx = Str(x); v = Vec(sx); for(j=1, length(sx), d = v[j]; if(d=="0"||d=="1"||d=="3"||d=="8", flag=1, flag=0; break); ); if(flag, print1(x", ")) ) } (Cino Hilliard)
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CROSSREFS
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Cf. A046031.
Sequence in context: A067569 A127518 A151693 this_sequence A080892 A074186 A064147
Adjacent sequences: A007281 A007282 A007283 this_sequence A007285 A007286 A007287
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KEYWORD
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nonn,easy,base
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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 Henry Bottomley (se16(AT)btinternet.com), Feb 14 2000
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