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%I #23 Feb 27 2020 04:34:54
%S 2,84,480,32256,58254,61440,1556480,3932160,1505806848,107870873600,
%T 1098437885952
%N (2,k)-perfect numbers (A019278) such that the next (2,k)-perfect number has the same value of k (in A098223)
%C a(12) > 4*10^12, if it exists. - _Giovanni Resta_, Feb 26 2020
%Y Cf. A019278, A098223.
%K nonn,more
%O 1,1
%A _Jud McCranie_, Feb 08 2012
%E a(11) from _Giovanni Resta_, Feb 26 2020