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 A379567 #13 Dec 26 2024 10:15:23 %S A379567 2,30,260,2316,20719,186565,1694033,15522194,143359184,1332981873, %T A379567 12466196499,117165976234,1105961883514,10478813824875,99613913708218, %U A379567 949727471728542 %N A379567 Number of n-digit numbers that have exactly 4 divisors. %F A379567 a(n) = A035533(n) - A035533(n-1) for n > 2. %Y A379567 Column k=4 of A284398. %Y A379567 Cf. A035533. %K A379567 nonn,more,base %O A379567 1,1 %A A379567 _Seiichi Manyama_, Dec 26 2024 %E A379567 a(10)-a(16) from _Seiichi Manyama_ using A035533 data, Dec 26 2024