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%I #8 Nov 27 2023 21:46:01
%S 4,72,1000,14700,206388,3201660,46132944,690153750,8341753936986000,
%T 127726170599795040,1963050484817866410,29928758453499691665,
%U 466352632039095734625,7143496319608441446500,111027787209709780725315
%N Integers of the form C(2n,n)^2 * Sum_{i=1..n} 1/phi(i).
%K nonn
%O 1,1
%A _Benoit Cloitre_, Jan 27 2002
%E Name corrected by _Sean A. Irvine_, Nov 27 2023
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