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 A051811 Numbers with nonzero multiplicative digital root 9. 2
 9, 19, 33, 90, 91, 109, 119, 133, 190, 191, 259, 295, 303, 313, 330, 331, 356, 365, 529, 536, 563, 592, 635, 653, 900, 901, 910, 911, 925, 952, 1009, 1019, 1033, 1090, 1091, 1109, 1119, 1133, 1190, 1191, 1259, 1295, 1303 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..43. Index entries for 10-automatic sequences. FORMULA A051802^-1(9) MATHEMATICA nzdr9[n_]:=Module[{idn=Select[IntegerDigits[n], #!=0&]}, Times@@idn]; nzdrQ[ n_]:= NestWhile[nzdr9[#]&, n, #>9&]==9; Select[Range[2000], nzdrQ] (* Harvey P. Dale, Sep 09 2014 *) CROSSREFS Part of histogram of A051802. Sequence in context: A190576 A250663 A274590 * A034056 A195042 A157034 Adjacent sequences: A051808 A051809 A051810 * A051812 A051813 A051814 KEYWORD nonn,easy,base AUTHOR Dan Hoey, Dec 09 1999 STATUS approved

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Last modified September 19 09:52 EDT 2024. Contains 376008 sequences. (Running on oeis4.)