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 A369243 #10 Jan 21 2024 18:09:49 %S A369243 2,0,14,45,198,5114,65174,1086194,20485574,465779078,0,293420849770, %T A369243 318745032938881 %N A369243 a(n) is the least integer k whose arithmetic derivative is equal to the n-th partial sum of primorials, and 0 if no such k exists. %C A369243 a(n) = the smallest integer k for which A003415(k) = A143293(n), and 0 if no such k exists. %H A369243 Antti Karttunen, <a href="/A369239/a369239.txt">PARI program for computing terms of this and related sequences</a>. %F A369243 a(n) <= A369244(n). %e A369243 a(0) = 2 as the least number k such that A003415(k) = A143293(0) = 1 is 2. %e A369243 a(1) = 0 as there is no number k such that A003415(k) = A143293(1) = 3. %Y A369243 Cf. A003415, A143293, A369244. %Y A369243 Cf also A368703. %K A369243 nonn,hard,more %O A369243 0,1 %A A369243 _Antti Karttunen_, Jan 19 2024