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A103888 Numbers n such that the string 100n001 is prime. 0
3, 8, 12, 21, 23, 38, 42, 45, 48, 51, 54, 56, 59, 69, 72, 83, 86, 92, 93, 105, 111, 113, 131, 135, 137, 159, 161, 162, 174, 176, 183, 203, 207, 209, 210, 228, 230, 237, 245, 246, 249, 260, 264, 267, 273, 287, 300, 324, 327, 330, 336, 341, 345, 362, 386, 390, 396 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

If n=3, then 100n001 = 1003001 (prime).

If n=51, then 100n001 = 10051001 (prime).

If n=93, then 100n001 = 10093001 (prime).

CROSSREFS

Cf. A099678.

Sequence in context: A287081 A352814 A294482 * A014255 A350221 A022407

Adjacent sequences:  A103885 A103886 A103887 * A103889 A103890 A103891

KEYWORD

base,nonn,less

AUTHOR

Parthasarathy Nambi, Mar 30 2005

EXTENSIONS

More terms from David Wasserman, Apr 24 2008

STATUS

approved

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Last modified August 15 00:08 EDT 2022. Contains 356122 sequences. (Running on oeis4.)