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 A109843 Least multiple of n with digit reversal a prime, or 0 if no such multiple exists. 0
 2, 2, 3, 16, 5, 0, 7, 16, 0, 20, 11, 0, 13, 14, 0, 16, 17, 0, 38, 20, 0, 110, 92, 0, 50, 104, 0, 112, 145, 30, 31, 32, 0, 34, 35, 0, 37, 38, 0, 160, 164, 0, 172, 1100, 0, 92, 188, 0, 98, 50, 0, 104, 106, 0, 110, 112, 0, 754, 118, 0, 305, 124, 0, 128, 130, 0, 134, 136, 0, 70, 71, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(3k) = 0, k > 0. A subsidiary sequence could be obtained by replacing a(3n) by the least multiple of n which on division by largest power of 3 that divides it gives a number whose digit reversal is prime. Note also that a(77) = 0. - Joshua Zucker, May 04 2006 LINKS Table of n, a(n) for n=1..72. CROSSREFS Sequence in context: A274983 A153938 A060790 * A341768 A184840 A164022 Adjacent sequences: A109840 A109841 A109842 * A109844 A109845 A109846 KEYWORD base,easy,nonn AUTHOR Amarnath Murthy, Jul 06 2005 EXTENSIONS More terms from Joshua Zucker, May 04 2006 STATUS approved

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Last modified August 8 16:21 EDT 2024. Contains 375023 sequences. (Running on oeis4.)