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 A377184 #21 Nov 29 2024 21:41:30 %S A377184 0,1,3,6,18 %N A377184 Numbers k such that L(k)+1 is prime, where L(k) is the k-th Lucas number. %C A377184 Positive terms must be a power of 3 or twice a power of 3. All other terms have trivial factors. No other terms under 10^7 (a(6) > 10^7). %e A377184 18 is a term because L(18)+1 = 5779 which is prime. Also 18 = 2*3^2. %Y A377184 Indices of primes in A001612. %Y A377184 Cf. A000032, A000204, A001606. %K A377184 nonn,more %O A377184 1,3 %A A377184 _Harsh Aggarwal_, Oct 18 2024