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 A173684 #36 Sep 08 2022 08:45:50
%S A173684 10,14,65,391,1003,2602,10967,2178341,701408777,86267571326,
%T A173684 591286729937,4052739537943,72723460248209,117669030461063,
%U A173684 3416454622906783,61305790721611673,420196140727489759,2427893228399975082557,251728825683549488150424389
%N A173684 Semiprimes of the form Fibonacci(k) + k.
%C A173684 This is to A069108 as semiprimes are to primes. A002062(k) is semiprime for k = 5, 6, 10, 14, 16, 18, 21, 32, ...
%H A173684 Vincenzo Librandi, <a href="/A173684/b173684.txt">Table of n, a(n) for n = 1..24</a>
%F A173684 A002062 INTERSECTION A001358.
%e A173684 F(21) + 21 = 10967 = 11 * 997, thus 10967 is in the sequence.
%t A173684 Select[Table[Fibonacci[n]+n,{n,200}],PrimeOmega[#]==2&] (* _Harvey P. Dale_, Nov 02 2011 *)
%o A173684 (Magma) IsSemiprime:=func< n | &+[ k[2]: k in Factorization(n) ] eq 2 >; [ a: n in [1..100] | IsSemiprime(a) where a is n+Fibonacci(n) ]; // _Klaus Brockhaus_, Jan 27 2011
%Y A173684 Cf. A000045, A001358, A002062, A053409, A069108.
%K A173684 nonn
%O A173684 1,1
%A A173684 _Jonathan Vos Post_, Jan 26 2011