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A075016 Smallest k such that the concatenation k, k-1,k-2 is divisible by n; or 0 if no such number exists. 1
2, 2, 2, 4, 2, 2, 2, 4, 4, 2, 12, 4, 105, 2, 2, 4, 7, 4, 18, 22, 2, 12, 11, 4, 27, 118, 4, 106, 21, 2, 23, 14, 12, 34, 2, 4, 112, 18, 105, 22, 15, 2, 39, 34, 7, 14, 9, 4, 141, 52, 7, 118, 58, 4, 12, 106, 18, 50, 38, 22, 10, 54, 106, 14, 157 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
a(11) = 12 as 11 divides 121110.
MATHEMATICA
skc[n_]:=Module[{k=2}, While[Mod[FromDigits[Flatten[IntegerDigits/@ Range[ k, k-2, -1]]], n]!=0, k++]; k]; Array[skc, 70] (* Harvey P. Dale, Nov 01 2019 *)
CROSSREFS
Sequence in context: A242310 A102298 A049298 * A279409 A102445 A102430
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Sep 01 2002
EXTENSIONS
More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003
STATUS
approved

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Last modified March 28 16:58 EDT 2024. Contains 371254 sequences. (Running on oeis4.)