A175085 Numbers m such that product of perfect divisors of x = m has no solution.

4, 9, 25, 32, 36, 49, 100, 121, 144, 169, 196, 225, 243, 289, 324, 361, 400, 441, 484, 512, 529, 576, 676, 784, 841, 900, 961, 1024, 1089, 1156, 1225, 1369, 1444, 1521, 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

Offset: 1

Author

Jaroslav Krizek, Jan 24 2010

Keywords

• nonn

Comments

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

Links

• Antti Karttunen, Table of n, a(n) for n = 1..119

Crossrefs

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

Extensions

More terms from Antti Karttunen, Nov 21 2017