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%I #15 Apr 17 2022 21:51:41
%S 1,170,364,679,5044,5130,5670,5770,8721,8736,9154,9639,9809,14322,
%T 16376,22413,27783,30256,32025,37114,38760,51455,71604,78570,82615,
%U 88392,92004,100821,101153,104168,115430,121056,133569,139954,148568
%N Numbers n such that phi(n) and sigma(n) are simultaneously perfect squares.
%C A subsequence of A011257. - _M. F. Hasler_, Sep 22 2009
%H Donovan Johnson, <a href="/A067781/b067781.txt">Table of n, a(n) for n = 1..5000</a>
%F A067781 = A006532 intersect A039770. - _M. F. Hasler_, Sep 22 2009
%Y Cf. A006532, A011257, A039770.
%K nonn
%O 1,2
%A _Benoit Cloitre_, Feb 07 2002
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