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A096524 Numbers n such that n.0.n+1 is prime, where '.' represents concatenation. Or, n such that 10^(k+1)*n + n + 1 is prime, where k is the number of digits in n. 1
6, 8, 20, 36, 38, 42, 48, 50, 66, 72, 78, 96, 128, 140, 150, 152, 188, 212, 216, 218, 272, 296, 300, 318, 330, 336, 360, 366, 372, 386, 398, 408, 422, 446, 462, 482, 488, 492, 498, 542, 546, 552, 560, 570, 582, 608, 630, 638, 672, 678, 710, 716, 740, 756, 780 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A096525 for the actual primes.

LINKS

Table of n, a(n) for n=1..55.

MATHEMATICA

Select[Range[1000], PrimeQ[FromDigits[Join[IntegerDigits[#], {0}, IntegerDigits[ #]]]+1]&] (* Harvey P. Dale, Nov 17 2014 *)

CROSSREFS

Sequence in context: A113806 A105775 A159469 * A083595 A064840 A306379

Adjacent sequences:  A096521 A096522 A096523 * A096525 A096526 A096527

KEYWORD

base,easy,nonn

AUTHOR

Jason Earls, Jun 23 2004

STATUS

approved

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Last modified January 25 01:33 EST 2020. Contains 331229 sequences. (Running on oeis4.)