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A094147 Numbers that can be written as sum of squares of two divisors. 0
2, 8, 18, 20, 32, 50, 72, 80, 90, 98, 128, 162, 180, 200, 242, 272, 288, 320, 338, 360, 392, 450, 468, 500, 512, 578, 648, 650, 720, 722, 800, 810, 882, 968, 980, 1058, 1088, 1152, 1250, 1280, 1332, 1352, 1440, 1458, 1568, 1620, 1682, 1800, 1872 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsequence of A000404; A001105 is a subsequence.

LINKS

Table of n, a(n) for n=1..49.

EXAMPLE

6 and 12 are divisors of 180 and 6^2 + 12^2 = 36 + 144 = 180,

therefore 180 is a term.

CROSSREFS

Sequence in context: A228615 A267823 A063664 * A117612 A320662 A171613

Adjacent sequences:  A094144 A094145 A094146 * A094148 A094149 A094150

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 01 2004

STATUS

approved

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Last modified May 20 21:27 EDT 2019. Contains 323426 sequences. (Running on oeis4.)