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A071835
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Numbers k such that the largest prime factor of k is equal to floor(sqrt(k)).
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2
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4, 8, 9, 12, 25, 30, 49, 56, 63, 121, 132, 169, 182, 195, 289, 306, 361, 380, 399, 529, 552, 575, 841, 870, 961, 992, 1023, 1369, 1406, 1443, 1681, 1722, 1849, 1892, 1935, 2209, 2256, 2303, 2809, 2862, 2915, 3481, 3540, 3721, 3782, 3843, 4489, 4556, 4623
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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Select[Range[2, 5000], FactorInteger[#][[-1, 1]] == Floor[Sqrt[#]] &] (* Amiram Eldar, Apr 23 2022 *)
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PROG
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(PARI) for(n=2, 10000, if(component(component(factor(n), 1), omega(n))==floor(sqrt(n)), print1(n, ", ")))
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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