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A115915 Numbers k such that k + phi(k) is a brilliant number (A078972). 1

%I #5 Jul 15 2021 21:25:17

%S 4,5,9,10,11,13,61,87,127,181,241,253,265,287,295,321,323,349,361,363,

%T 377,397,407,409,421,451,457,473,481,485,511,515,527,537,541,581,595,

%U 631,635,671,695,705,721,731,751,757,763,769,793,805,807,843,851,867

%N Numbers k such that k + phi(k) is a brilliant number (A078972).

%e 295 + phi(295) = 527 = 17*31.

%Y Cf. A078972, A115916.

%K nonn,base

%O 1,1

%A _Giovanni Resta_, Feb 06 2006

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Last modified April 18 02:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)