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 A049530 #11 Aug 14 2020 06:25:08 %S A049530 842,842,842,842,843,1444,5169,15961,45612,363035,363036,364472, %T A049530 368073,403471,403489,403489,403490,403494,403585,404089,404172, %U A049530 725931,730924 %N A049530 pi(n) associated with A049529. %H A049530 C. Caldwell and G. L. Honaker, Jr., <a href="https://utm.edu/staff/caldwell/preprints/6521.pdf">Is pi(6521)=6!+5!+2!+1! unique?</a>, Math. Spectrum, 22:2 (2000/2001) 34-36. %F A049530 a(n) = A000720(A049529(n)). - _Michel Marcus_, Aug 14 2020 %e A049530 a(5)=843 because pi(6521)=6!+5!+2!+1!=843. %Y A049530 Cf. A000720, A049529. %K A049530 fini,full,nonn %O A049530 1,1 %A A049530 _G. L. Honaker, Jr._