id:A161882 - OEIS Search Results

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Smallest k such that n^2 = a_1^2+...+a_k^2 and all a_i are positive integers less than n.

+0
4

4, 3, 4, 2, 3, 3, 4, 3, 2, 3, 3, 2, 3, 2, 4, 2, 3, 3, 2, 3, 3, 3, 3, 2, 2, 3, 3, 2, 2, 3, 4, 3, 2, 2, 3, 2, 3, 2, 2, 2, 3, 3, 3, 2, 3, 3, 3, 3, 2 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`Related to hypotenuse numbers: A161882(A009003(n))=2 for all n.`
	LINKS	`Jean-Charles Meyrignac, Computing Minimal Equal Sums Of Like Powers` `Weisstein, Eric W., Diophantine Equation 2nd Powers`
	EXAMPLE	`It is possible to write 2^2 as 1^2+1^2+1^2+1^2, so a(2)=4. It is possible to write 3^2 as 2^2+2^2+1^2, so a(3)=3`
	CROSSREFS	`Cf. A161883, A161884, A161885.` `Sequence in context: A070511 A066340 A143505 this_sequence A082125 A058290 A002285` `Adjacent sequences: A161879 A161880 A161881 this_sequence A161883 A161884 A161885`
	KEYWORD	`nonn`
	AUTHOR	`Dmitry Kamenetsky (dkamen(AT)rsise.anu.edu.au), Jun 21 2009`

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Last modified November 24 19:42 EST 2009. Contains 167435 sequences.

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