A046895 - OEIS

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A046895

Sizes of successive clusters in Z^4 lattice.

1, 9, 33, 65, 89, 137, 233, 297, 321, 425, 569, 665, 761, 873, 1065, 1257, 1281, 1425, 1737, 1897, 2041, 2297, 2585, 2777, 2873, 3121, 3457, 3777, 3969, 4209, 4785, 5041, 5065, 5449, 5881, 6265, 6577, 6881, 7361, 7809, 7953, 8289, 9057 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	COMMENTS	`Number of lattice points inside or on the 4-sphere x^2+y^2+z^2+u^2=n. - T. D. Noe, Mar 14 2009`
	LINKS	`T. D. Noe, Table of n, a(n) for n=0..1000`
	FORMULA	`a(n) = A122510(4,n). a(n^2)=A055410(n). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Apr 21 2010]`
	CROSSREFS	`Partial sums of A000118.` `Cf. A117609` `Sequence in context: A146262 A161430 A175369 * A165392 A145923 A092562` `Adjacent sequences: A046892 A046893 A046894 * A046896 A046897 A046898`
	KEYWORD	`nonn,easy,nice`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 23:45 EST 2012. Contains 205978 sequences.