A134606 Numbers such that the square root of the sum of squares of their prime factors is a nonprime integer.

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

Offset

1,1

Comments

No prime number is a term. - Hieronymus Fischer, Apr 19 2011

Links

Hieronymus Fischer, Table of n, a(n) for n = 1..10000

Example

a(3)=351, since 351=3*3*3*13 and sqrt(3*3^2+13^2)=sqrt(196)=14.

Crossrefs

Cf. A001597, A025475, A134333, A134344, A134376.

Cf. A134600, A134602, A134608, A134611, A134616, A134618, A134620.

Sequence in context: A056118 A372998 A351602 * A343324 A360906 A343284

Adjacent sequences: A134603 A134604 A134605 * A134607 A134608 A134609

Keyword

nonn

Author

Hieronymus Fischer, Nov 11 2007

Status

approved