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 A085124 Smallest multiple of n whose digital product is also a multiple of n, or 0 if no such number exists. 9
 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 168, 0, 378, 135, 48, 0, 36, 0, 0, 273, 0, 0, 168, 525, 0, 999, 476, 0, 0, 0, 288, 0, 0, 175, 1296, 0, 0, 0, 0, 0, 378, 0, 0, 495, 0, 0, 384, 3577, 0, 0, 0, 0, 1296, 0, 728, 0, 0, 0, 0, 0, 0, 1197, 448, 0, 0, 0, 0, 0, 0, 0, 1368, 0, 0, 3525, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = 0 if n is not a term of A002473 (i.e., not a highly composite number). a(n) = 0 if n = 10k. Conjecture: otherwise, a(n) is positive. Sequence may be redefined to avoid large number of zeros by restricting it to members of A002473 which are not divisible by 10. LINKS Table of n, a(n) for n=1..80. CROSSREFS Sequence in context: A297232 A093691 A004176 * A252648 A054054 A115353 Adjacent sequences: A085121 A085122 A085123 * A085125 A085126 A085127 KEYWORD base,nonn AUTHOR Amarnath Murthy, Jul 06 2003 EXTENSIONS More terms from David Wasserman, Jan 27 2005 Comments edited by Jon E. Schoenfield, Mar 30 2014 STATUS approved

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Last modified September 15 00:47 EDT 2024. Contains 375929 sequences. (Running on oeis4.)