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A134606 Numbers such that the square root of the sum of squares of their prime factors is a nonprime integer. 2
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; text; internal format)
OFFSET
1,1
COMMENTS
No prime number is a term. - Hieronymus Fischer, Apr 19 2011
LINKS
EXAMPLE
a(3)=351, since 351=3*3*3*13 and sqrt(3*3^2+13^2)=sqrt(196)=14.
CROSSREFS
Sequence in context: A187457 A056118 A351602 * A343324 A360906 A343284
KEYWORD
nonn
AUTHOR
Hieronymus Fischer, Nov 11 2007
STATUS
approved

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Last modified March 29 06:15 EDT 2024. Contains 371265 sequences. (Running on oeis4.)