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 A122991 #19 Oct 12 2024 09:04:11 %S A122991 2,4,5,9,85,96,213,800,4200,18697,96877 %N A122991 Indices of primes in tribonacci sequence A000073, minus 2. %C A122991 Also, indices of primes in A282718. %F A122991 A000073(a(n) + 2) = A092836(n). %F A122991 a(n) = A303263(n) - 2 = A092835(n) - 1. %Y A122991 Cf. A000073, A092835, A092836, A282718, A303263. %K A122991 nonn,more %O A122991 1,1 %A A122991 _Artur Jasinski_, Oct 28 2006 %E A122991 Name corrected and a(10)-a(11) added by _Andrew Howroyd_, Oct 10 2024