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 A128070 #14 Jun 13 2021 03:21:51
%S A128070 3,103,271,523,23087,69833
%N A128070 Numbers k such that (3^k + 11^k)/14 is prime.
%C A128070 All terms are primes.
%C A128070 a(7) > 10^5. - _Robert Price_, Mar 04 2013
%t A128070 k=11; Do[ p=Prime[n]; f=(3^p+k^p)/(k+3); If[ PrimeQ[f], Print[p]], {n,1,100} ]
%o A128070 (PARI) is(n)=isprime((3^n+11^n)/14) \\ _Charles R Greathouse IV_, Feb 17 2017
%Y A128070 Cf. A007658 (numbers k such that (3^k + 1)/4 is prime).
%Y A128070 Cf. A057469 (numbers k such that (3^k + 2^k)/5 is prime).
%Y A128070 Cf. A122853 (numbers k such that (3^k + 5^k)/8 is prime).
%Y A128070 Cf. A128066, A128067, A128068, A128069, A128071, A128072, A128073, A128074, A128075.
%Y A128070 Cf. A059801 (numbers k such that 4^k - 3^k is prime).
%Y A128070 Cf. A121877 (numbers k such that (5^k - 3^k)/2 is prime).
%Y A128070 Cf. A128024, A128025, A128026, A128027, A128028, A128029, A128030, A128031, A128032.
%K A128070 hard,more,nonn
%O A128070 1,1
%A A128070 _Alexander Adamchuk_, Feb 14 2007
%E A128070 a(5)-a(6) from _Robert Price_, Mar 04 2013