A050453 Sum_{d|n, d=3 mod 4} d^2.

0, 0, 9, 0, 0, 9, 49, 0, 9, 0, 121, 9, 0, 49, 234, 0, 0, 9, 361, 0, 58, 121, 529, 9, 0, 0, 738, 49, 0, 234, 961, 0, 130, 0, 1274, 9, 0, 361, 1530, 0, 0, 58, 1849, 121, 234, 529, 2209, 9, 49, 0, 2610, 0, 0, 738, 3146, 49, 370, 0, 3481, 234, 0, 961, 4027

Offset: 1

Author

N. J. A. Sloane, Dec 23 1999

Keywords

• nonn

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A027750, A050450.

Programs

Haskell

a050453 = sum . map (^ 2) . filter ((== 3) . (`mod` 4)) . a027750_row
-- Reinhard Zumkeller, Jun 17 2013