This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A066725 #16 Dec 06 2024 20:19:17
%S A066725 2,11,23,29,41,43,47,61,67,89,149,163,167,211,223,227,229,233,251,257,
%T A066725 263,269,281,349,367,383,419,431,433,439,463,491,521,523,569,587,613,
%U A066725 617,631,643,659,661,673,761,769,821,827,857,883,887,929,941,967,1123
%N A066725 Primes whose product of digits + 1 is also prime.
%H A066725 Harry J. Smith, <a href="/A066725/b066725.txt">Table of n, a(n) for n = 1..1000</a>
%F A066725 A084354 MINUS A011540. - _R. J. Mathar_, Aug 26 2007
%e A066725 2 * 2 * 3 + 1 = 13, a prime; since 223 is also prime, it is a term of the sequence.
%t A066725 Select[Prime[Range[200]],PrimeQ[Times@@IntegerDigits[#]+1]&] (* _Harvey P. Dale_, May 09 2012 *)
%o A066725 (PARI) isok(p)={ isprime(p) && isprime(vecprod(digits(p)) + 1) } \\ _Harry J. Smith_, Mar 19 2010
%Y A066725 Primes in A081988.
%Y A066725 Cf. A011540, A084354.
%K A066725 easy,nonn,base
%O A066725 1,1
%A A066725 _Joseph L. Pe_, Jan 15 2002
%E A066725 Terms a(35)-a(54) from _Harry J. Smith_, Mar 19 2010