%I #24 Sep 20 2017 10:46:31
%S 2,6,24,40,104,94,728,248,376,614,611394,584,1880,3055,2632,1570
%N Least number k such that the sum of squares of positive divisors of k is the sum of two nonzero squares in exactly n ways.
%C Least number k such that A001157(k) is the sum of two nonzero squares in exactly n ways.
%C a(17), if it exists, is > 10^7. Additional terms for n > 16: ?, 2914, ?, 2456, 21490, 18330, 13160, 4216, 40152, ?, 11656, 17192, ?, 12280, 156570, 9734, 4306794, ?, 431634, 17954, 411558, 173992, ?, 22922, 77080, 85960... - _Lars Blomberg_, Sep 20 2017
%e a(2) = 6 because 6 is divisible by 1, 2, 3, 6. 1^2 + 2^2 + 3^2 + 6^2 = 1^2 + 7^2 = 5^2 + 5^2.
%Y Cf. A001157, A016032.
%K nonn,more
%O 1,1
%A _Altug Alkan_, Jun 13 2016
%E a(11) from _Giovanni Resta_, Jun 13 2016
%E a(14)-a(16) from _Lars Blomberg_, Sep 20 2017