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 A379810 #20 Feb 23 2025 11:14:34 %S A379810 15,46,104,305,261,1691,380,406,508,1175,3281,7729,2827,10877,6289, %T A379810 13289,1737,4829,2945,3205,9673,1940,21253,1970,31921,21127,34861, %U A379810 5457,22219,120983,99893,110843,148613,105029,164107,12905,89279,15245,195617,79909,89827 %N A379810 Composite numbers in A381019 which are immediately followed by another composite number, in order of their appearance. %C A379810 Conjecture: For any k >= 1, A381019 contains k consecutive composite terms. %C A379810 When is the first instance of three consecutive composite terms? %F A379810 a(n) = A381019(A381120(n)). %Y A379810 Cf. A381019, A381120. %K A379810 nonn %O A379810 1,1 %A A379810 _N. J. A. Sloane_, Feb 15 2025 %E A379810 a(6)-a(8) from _Michael De Vlieger_, Feb 15 2025 %E A379810 More terms from _Jinyuan Wang_, Feb 23 2025