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A124117 a(n) the smallest composite number of n+1 digits that becomes a prime by incrementing any one of the higher order digits. 0
21, 129, 1003, 10681, 101829, 1020831, 10251129, 100780743, 1051460221, 10153541853, 103257526729, 1483112006019 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..12.

EXAMPLE

a(4)=10681 as 20681, 11681, 10781 and 10691 are prime

CROSSREFS

Sequence in context: A041852 A220712 A295916 * A219926 A219739 A228283

Adjacent sequences: A124114 A124115 A124116 * A124118 A124119 A124120

KEYWORD

hard,nonn,base

AUTHOR

Anton Vrba (antonvrba(AT)yahoo.com), Nov 28 2006

EXTENSIONS

a(11)-a(12) from Donovan Johnson, Nov 24 2010

STATUS

approved

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Last modified February 2 06:48 EST 2023. Contains 360000 sequences. (Running on oeis4.)