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A113695 a(1) = 1, a(2) = 2 then the least number starting with n so that every term divides the concatenation of its neighbors. 1
1, 2, 30, 40, 520, 6120, 75080, 821920, 9125440, 1012882880, 11690270720, 127219466240, 1377297694720, 14982604718080, 1512710259671040, 16662943738757120, 178381140013219840, 18013061754595573760 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

a(2)=2 divides the concatenated a(1)a(3)=130. a(3)=30 divides the concatenated a(2)a(4)=240. a(4)=40 divides the concatenated a(3)a(5)=30520.

CROSSREFS

Cf. A113696.

Sequence in context: A145290 A127026 A105962 * A098827 A280380 A184238

Adjacent sequences:  A113692 A113693 A113694 * A113696 A113697 A113698

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Nov 11 2005

EXTENSIONS

Corrected and extended by R. J. Mathar, Aug 31 2007

STATUS

approved

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Last modified August 22 16:37 EDT 2019. Contains 326179 sequences. (Running on oeis4.)