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Search: id:A074832
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| A074832 |
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Primes whose binary reversal is also prime. |
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+0
7
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| 3, 5, 7, 11, 13, 17, 23, 29, 31, 37, 41, 43, 47, 53, 61, 67, 71, 73, 83, 97, 101, 107, 113, 127, 131, 151, 163, 167, 173, 181, 193, 197, 199, 223, 227, 229, 233, 251, 257, 263, 269, 277, 283, 307, 313, 331, 337, 349, 353, 359, 373, 383, 409, 421, 431, 433, 443
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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T. D. Noe, Table of n, a(n) for n=1..10000
MathPages, Reflective and Cyclic Sets of Primes
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EXAMPLE
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349 = 101011101, reverse the sequence of one and zeros: 101110101 = 373 which is also prime.
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MATHEMATICA
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Prime[ Select[ Range[100], PrimeQ[ FromDigits[ Reverse[ IntegerDigits[ Prime[ # ], 2]], 2]] &]]
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PROGRAM
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for(int p=0; p<100; p++) { int rp = bitrev(p); if(isprime(p) && isprime(rp)) cout << p << " "; }
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CROSSREFS
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Cf. A007500 (primes whose decimal reversal is also prime)
Sequence in context: A069467 A096169 A090670 this_sequence A075794 A135832 A074781
Adjacent sequences: A074829 A074830 A074831 this_sequence A074833 A074834 A074835
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KEYWORD
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base,easy,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Sep 09 2002
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