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A191245 Primes that remain prime if the bit pattern 10 is attached as the most-significant bits to their binary representation. 0
3, 7, 11, 19, 53, 97, 103, 127, 131, 149, 179, 197, 227, 239, 277, 283, 337, 349, 409, 457, 463, 487, 499, 569, 599, 641, 659, 683, 701, 719, 743, 809, 839, 953, 971, 1013, 1019, 1051, 1093, 1201, 1213, 1237, 1291, 1297, 1303, 1321, 1381, 1423, 1543, 1597, 1621, 1747, 1753, 1783, 1801 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Obtained by chopping the two most-significant bits off the associated A191235(n). - R. J. Mathar, Jun 03 2011

LINKS

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

EXAMPLE

19 is in the sequence, because 19=10011_2 prefixed with 10_2 is 1010011_2 = 19+62=83 which still is prime.

MATHEMATICA

Select[Prime[Range[300]], PrimeQ[FromDigits[Join[{1, 0}, IntegerDigits[ #, 2]], 2]]&] (* Harvey P. Dale, Apr 11 2012 *)

CROSSREFS

Cf. A004676, A191235.

Sequence in context: A132453 A033871 A060288 * A282914 A284027 A111056

Adjacent sequences:  A191242 A191243 A191244 * A191246 A191247 A191248

KEYWORD

nonn,base,less

AUTHOR

Juri-Stepan Gerasimov, May 28 2011

EXTENSIONS

Corrected by R. J. Mathar, Jun 03 2011

STATUS

approved

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Last modified July 18 15:41 EDT 2019. Contains 325144 sequences. (Running on oeis4.)