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 A267193 Complement obverse of n. 10
 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 98, 88, 78, 68, 58, 48, 38, 28, 18, 8, 97, 87, 77, 67, 57, 47, 37, 27, 17, 7, 96, 86, 76, 66, 56, 46, 36, 26, 16, 6, 95, 85, 75, 65, 55, 45, 35, 25, 15, 5, 94, 84, 74, 64, 54, 44, 34, 24, 14, 4, 93, 83, 73, 63, 53, 43, 33, 23, 13 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS Replace digits of n by their 9's complements, reverse the order, omit any leading zeros. Suggested by a posting by Mike Stay to the Math Fun Mailing List, Jan 24 2016, which in turn was loosely based on the definition used in logic (see the Philosophy Pages link). LINKS Alois P. Heinz, Table of n, a(n) for n = 0..9999 Garth Kemerling, Philosophy Pages: Immediate Inferences. EXAMPLE The 9's complement of the digits of 980 are 019, so a(980) = 910. MAPLE a:= n-> (s-> parse(cat(seq(9-s[i], i=1..nops(s))))          )(convert(n, base, 10)): seq(a(n), n=0..100);  # Alois P. Heinz, Jan 24 2016 CROSSREFS Cf. A061601 (9's complement of n). Sequence in context: A084019 A061601 A098756 * A112454 A304621 A138531 Adjacent sequences:  A267190 A267191 A267192 * A267194 A267195 A267196 KEYWORD nonn,base AUTHOR N. J. A. Sloane, Jan 24 2016 EXTENSIONS More terms from Alois P. Heinz, Jan 24 2016 STATUS approved

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Last modified December 5 16:21 EST 2019. Contains 329753 sequences. (Running on oeis4.)