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 A281197 #34 May 08 2018 21:02:43 %S A281197 9,7,6,998,5,6331,15866,39860,100135,251616,636787,1617099,4124188, %T A281197 10553076,27066256,69709243,179992154,465769460,1208198239,3140421185, %U A281197 8179001679,21338684878,55762147707,145935688930,382465571795,1003652346718 %N A281197 Least number m such that A247600(m) = n. %F A281197 pi(n*a(n)) = a(n) + n. %e A281197 pi(5*9) = 9 + 5. %e A281197 pi(6*7) = 7 + 6. %e A281197 pi(7*6) = 6 + 7. %e A281197 pi(8*998) = 998 + 8. %e A281197 pi(9*5) = 5 + 9. %e A281197 ... %e A281197 pi(15*636787) = 636787 + 15. %e A281197 pi(16*1617099) = 1617099 + 16. %Y A281197 Cf. A000720, A247600. %K A281197 nonn,more %O A281197 5,1 %A A281197 _Seiichi Manyama_, Jan 17 2017 %E A281197 a(19)-a(28) from _Chai Wah Wu_, May 03 2018 %E A281197 a(29)-a(30) from _Chai Wah Wu_, May 08 2018