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A134606
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Numbers such that the square root of the sum of squares of their prime factors is a nonprime integer.
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1
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16, 81, 351, 512, 625, 1080, 1260, 1350, 1375, 1792, 1836, 2070, 2145, 2175, 2401, 2730, 2772, 3510, 4104, 4305, 4625, 4650, 4655, 4998, 5880, 6000, 6545, 7098, 7182, 7791, 7889, 7956, 9030, 9108, 9295, 9324, 10098, 10368, 10545, 11628, 11935, 12096
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| a(2)=351, since 351=3*3*3*13 and sqrt(3*3^2+13^2)=sqrt(196)=14.
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CROSSREFS
| Cf. A001597, A025475, A134333, A134344, A134376.
Cf. A134600, A134602, A134608, A134611, A134616, A134618, A134620.
Sequence in context: A113317 A187457 A056118 * A108941 A153157 A113849
Adjacent sequences: A134603 A134604 A134605 * A134607 A134608 A134609
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KEYWORD
| nonn
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AUTHOR
| Hieronymus Fischer (Hieronymus.Fischer(AT)gmx.de), Nov 11 2007
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