A175373 Partial sums of A175372.

1, 5, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 13, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25

Offset: 0

Author

R. J. Mathar, Apr 24 2010

Keywords

• nonn

Comments

Number of integer pairs (x,y) satisfying x^4+y^4 <= n, any -n <= x,y <=n.

Examples

			a(6) = 9 counts (x,y) = (-1,-1), (-1,0), (-1,1), (0,-1), (0,0), (0,1), (1,-1), (1,0) and (1,1).
		

Crossrefs

Cf. A057655, A175363.