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 A077312 Smallest k such that the concatenation of natural numbers from (n+1) to k is a multiple of n. 2
 2, 4, 5, 6, 10, 8, 16, 12, 17, 20, 21, 20, 35, 30, 20, 20, 19, 26, 22, 40, 41, 32, 40, 36, 50, 48, 53, 44, 54, 50, 141, 52, 44, 36, 55, 44, 1035, 90, 77, 60, 101, 62, 47, 76, 80, 88, 97, 68, 145, 100, 53, 148, 146, 80, 65, 76, 60, 108, 103, 80, 107, 102, 108, 104, 115, 98 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..66. MATHEMATICA Do[k = n + 1; s = ToString[k]; While[Mod[ToExpression[s], n] > 0, k++; s = s <> ToString[k]]; Print[k], {n, 1, 100}] (* Ryan Propper, Oct 10 2005 *) CROSSREFS Cf. A077310, A077311. Sequence in context: A122721 A014224 A175342 * A325558 A140779 A348937 Adjacent sequences: A077309 A077310 A077311 * A077313 A077314 A077315 KEYWORD base,nonn AUTHOR Amarnath Murthy, Nov 03 2002 EXTENSIONS More terms from Ryan Propper, Oct 10 2005 STATUS approved

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Last modified December 5 23:11 EST 2023. Contains 367594 sequences. (Running on oeis4.)