id:A057656 - OEIS Search Results

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Number of points (x,y) in square lattice with (x-1/2)^2+y^2 <= n.

+0
2

2, 6, 8, 12, 16, 16, 22, 26, 26, 30, 34, 38, 40, 44, 44, 48, 56, 56, 60, 60, 62, 70, 74, 74, 78, 82, 82, 86, 90, 94, 96, 104, 104, 104, 108, 108, 116, 120, 124, 128, 128, 128, 134, 138, 138, 142, 150, 150, 154, 158, 158, 166, 166, 166, 166, 174 (list; graph; listen)

	OFFSET	`0,1`
	REFERENCES	`J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 106.`
	CROSSREFS	`Partial sums of A004020. Cf. A057656, A057961, A057962.` `Sequence in context: A138626 A064796 A083769 this_sequence A084724 A111051 A077561` `Adjacent sequences: A057653 A057654 A057655 this_sequence A057657 A057658 A057659`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Oct 15 2000`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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