A124117 a(n) the smallest composite number of n+1 digits that becomes a prime by incrementing any one of the higher order digits.

21, 129, 1003, 10681, 101829, 1020831, 10251129, 100780743, 1051460221, 10153541853, 103257526729, 1483112006019

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