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 A104576 #16 Jul 31 2024 11:08:20 %S A104576 2,3,4,7,8,9,10,12,20,30,33,66,76,77,82,87,98,180,205,360,553,719,766, %T A104576 1390,1879,1999,4033,5620,16506,17436,23676,24428,27758,31932,58199, %U A104576 67661,85040,102023,185595 %N A104576 Indices of primes in A001644 (the Lucas 3-step numbers). %C A104576 The sequence of generalized tribonacci numbers is defined as beginning with 1, 3, 7. Subsequent terms are the sum of the previous three terms. Note that the sequence of these generalized tribonacci numbers has many more primes than the tribonacci sequence A000073 (whose prime indices are in A092835). %C A104576 a(40) > 2*10^5. - _Robert Price_, Dec 24 2013 %H A104576 Tony D. Noe and Jonathan Vos Post, <a href="http://www.cs.uwaterloo.ca/journals/JIS/VOL8/Noe/noe5.html">Primes in Fibonacci n-step and Lucas n-step Sequences,</a> J. of Integer Sequences, Vol. 8 (2005), Article 05.4.4 %F A104576 A001644(a(n)) = A105762(n). - _Arthur O'Dwyer_, Jul 26 2024 %Y A104576 Cf. A104577 (indices of prime generalized tetranacci numbers). %Y A104576 Cf. A000073, A001644, A092835, A105762. %K A104576 nonn,more %O A104576 1,1 %A A104576 _T. D. Noe_, Mar 16 2005 %E A104576 a(37)-a(39) from _Robert Price_, Dec 24 2013 %E A104576 Name clarified by _Arthur O'Dwyer_, Jul 25 2024