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

1,3

Links

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

Prog

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

Crossrefs

Cf. A027750, A050450.

Sequence in context: A230068 A176908 A005083 * A338017 A341808 A340946

Adjacent sequences: A050450 A050451 A050452 * A050454 A050455 A050456

Keyword

nonn

Author

N. J. A. Sloane, Dec 23 1999

Status

approved