login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A180528 Primes that become a different prime under the mapping 1 <=> 5. 1

%I #11 Oct 29 2023 16:09:55

%S 13,19,53,59,103,109,163,193,199,313,353,503,509,563,593,599,613,619,

%T 653,659,1009,1019,1039,1087,1103,1117,1163,1237,1279,1297,1303,1399,

%U 1453,1459,1483,1553,1559,1567,1579,1597,1613,1619,1669,1693,1783,1867

%N Primes that become a different prime under the mapping 1 <=> 5.

%H Robert Price, <a href="/A180528/b180528.txt">Table of n, a(n) for n = 1..2200</a>

%H <a href="/index/Pri#primes">Index to Primes</a>, Primes that become a different prime under some mapping.

%t fQ[n_] := Block[{id = IntegerDigits@n}, (MemberQ[id, 1] || MemberQ[id, 5]) && PrimeQ[ FromDigits[ id /. {1 -> 5, 5 -> 1}] ]]; Select[ Prime@ Range@ 300, fQ]

%Y Cf. A171024, A175791, A180517 thru A180559, A175789, A180560, A180561.

%K base,nonn

%O 1,1

%A _Zak Seidov_ and _Robert G. Wilson v_, Sep 09 2010

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 18 08:14 EDT 2024. Contains 371769 sequences. (Running on oeis4.)