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Numbers m such that product of perfect divisors of x = m has no solution.
4

%I #9 Nov 21 2017 21:34:51

%S 4,9,25,32,36,49,100,121,144,169,196,225,243,289,324,361,400,441,484,

%T 512,529,576,676,784,841,900,961,1024,1089,1156,1225,1369,1444,1521,

%U 1600,1681,1764,1849,1936,2025,2048,2116,2209,2304,2500,2601,2704,2809,2916,3025,3125,3136,3249,3364,3481,3600,3721,3844,3969,4225

%N Numbers m such that product of perfect divisors of x = m has no solution.

%C Perfect divisor of n is divisor d such that d^k = n for some k >= 1.

%H Antti Karttunen, <a href="/A175085/b175085.txt">Table of n, a(n) for n = 1..119</a>

%Y Subsequence of A001597 (perfect powers). Complement of A175084.

%K nonn

%O 1,1

%A _Jaroslav Krizek_, Jan 24 2010

%E More terms from _Antti Karttunen_, Nov 21 2017