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 A069860 Numbers n that divide the concatenation of n+1 and n+2. 16
 1, 2, 3, 4, 6, 17, 34, 51, 167, 334, 501, 1667, 3334, 5001, 14286, 16667, 33334, 50001, 166667, 333334, 500001, 1666667, 3333334, 5000001, 16666667, 33333334, 50000001, 166666667, 333333334, 500000001, 1666666667, 3333333334 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS FORMULA For k > 0, sequence contains (10^k+2)/2, (10^k+2)/3, (10^k+2)/6 and (10^(6k-1)+2)/7. The only other terms are 1 and 3. - David Wasserman, Aug 25 2005 EXAMPLE 17 divides 1819 hence is a member. MATHEMATICA Select[ Range[10^7], Mod[ FromDigits[ Join[ IntegerDigits[ # + 1], IntegerDigits[ # + 2]]], # ] == 0 & ] CROSSREFS Cf. A069860, A069861, A069862, A069871, A088797, A088798. Sequence in context: A285191 A271360 A236413 * A084391 A259383 A220702 Adjacent sequences:  A069857 A069858 A069859 * A069861 A069862 A069863 KEYWORD base,nonn AUTHOR Amarnath Murthy, Apr 18 2002 EXTENSIONS Edited and extended by Robert G. Wilson v, Apr 22 2002 More terms from David Wasserman, Aug 25 2005 STATUS approved

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Last modified October 14 18:28 EDT 2019. Contains 328022 sequences. (Running on oeis4.)