id:A000036 - OEIS Search Results

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Let A(n) = #{(i,j): i^2 + j^2 <= n}, V(n) = Pi*n, P(n) = A(n) - V(n); A000099 gives values of n where |P(n)| sets a new record; sequence gives (closest integer to, I believe) P(A000099(n)).
(Formerly M0610 N0221)

+0
7

2, 3, 5, 6, 6, -6, 7, 8, 10, 13, 13, 13, 14, -17, 17, 17, 18, -19, 20, -22, 23, 27, -29, -29, 29, -31, -32, -35, 36, -37, -40, -43, -46, -48, -50, -53, -55, -57, -60, -60, -61, -63, -66, -66, -68, -71, -74, -77, -79, -82, -85 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`W. C. Mitchell, The number of lattice points in a k-dimensional hypersphere, Math. Comp., 20 (1966), 300-310.`
	CROSSREFS	`Cf. A000092, A000099, A000223, A000323, A000413.` `Adjacent sequences: A000033 A000034 A000035 this_sequence A000037 A000038 A000039` `Sequence in context: A082654 A072636 A001600 this_sequence A128054 A023834 A084735`
	KEYWORD	`sign`
	AUTHOR	`njas`
	EXTENSIONS	`Revised Jun 26 2005`

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Last modified May 17 13:36 EDT 2008. Contains 139908 sequences.

AT&T Labs Research