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A277206 Primes that become palindromic primes when the least significant digit is deleted. 2

%I #18 Apr 12 2017 04:43:19

%S 23,29,31,37,53,59,71,73,79,113,1013,1019,1319,1511,1811,1913,3137,

%T 3533,3539,3733,3739,3833,7573,7577,7873,7877,7879,9199,9293,105019,

%U 106013,106019,113111,113117,114113,124213,127217,127219,128213,133319,138311,138319

%N Primes that become palindromic primes when the least significant digit is deleted.

%C 113 is the only term in the sequence with an odd number of digits.

%H Chai Wah Wu, <a href="/A277206/b277206.txt">Table of n, a(n) for n = 1..10000</a> a(n) for n = 1..500 from Colin Barker.

%o (PARI) revint(n) = m=n%10; n\=10; while(n>0, m=m*10+n%10; n\=10); m

%o L=List(); forprime(n=2, 100000, r=n\10; if(isprime(r) && revint(r)==r, listput(L, n))); Vec(L)

%Y Cf. A234912, A235000, A277689.

%K nonn,base

%O 1,1

%A _Colin Barker_, Apr 11 2017

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Last modified March 29 11:14 EDT 2024. Contains 371278 sequences. (Running on oeis4.)