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A073893 a(10k) = 0 and if n is not a multiple of 10 then a(n) is the smallest positive integer such that the concatenation of the first n terms is a multiple of n. 4
1, 2, 3, 2, 5, 2, 5, 6, 1, 0, 8, 4, 9, 4, 5, 6, 25, 2, 15, 0, 15, 10, 28, 16, 25, 16, 28, 16, 13, 0, 14, 4, 22, 36, 5, 16, 35, 14, 47, 0, 16, 8, 42, 28, 35, 18, 49, 44, 27, 0, 42, 4, 26, 6, 45, 52, 53, 38, 62, 0, 44, 50, 25, 28, 15, 32, 43, 72, 29, 0, 61, 44, 45, 8, 25, 56, 82, 84, 85, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Note that the concatenation of the first 10k terms is not necessarily a multiple of 10k.

LINKS

Table of n, a(n) for n=1..80.

CROSSREFS

Cf. A051883, A073894, A099552.

Sequence in context: A263978 A263726 A088167 * A099552 A252749 A076199

Adjacent sequences:  A073890 A073891 A073892 * A073894 A073895 A073896

KEYWORD

base,nonn,easy

AUTHOR

Amarnath Murthy, Aug 17 2002

EXTENSIONS

Edited and extended by David Wasserman, Oct 21 2004

STATUS

approved

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Last modified May 26 02:35 EDT 2019. Contains 323579 sequences. (Running on oeis4.)