id:A064272 - OEIS Search Results

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Number of representations of n as the sum of a prime number and a nonzero square.

+0
3

0, 1, 1, 0, 2, 1, 1, 1, 0, 2, 2, 0, 2, 1, 1, 1, 2, 1, 2, 2, 1, 2, 1, 0, 1, 3, 2, 1, 2, 0, 3, 2, 0, 2, 1, 0, 4, 2, 1, 2, 2, 1, 2, 2, 1, 3, 2, 1, 1, 2, 2, 2, 3, 1, 3, 2, 0, 2, 2, 0, 4, 2, 0, 2, 3, 2, 4, 2, 1, 2, 3, 1, 1, 3, 1, 4, 2, 1, 3, 1, 1, 5, 3, 0, 3, 3, 2, 2, 2, 0, 4, 2, 1, 3, 2, 1, 4, 1, 1, 2, 3, 2, 3, 4, 1 (list; graph; listen)

	OFFSET	`2,5`
	COMMENT	`a(A064233(n))=0.`
	FORMULA	`%F A064272 a(n) = SUM(A010051(k)*A010052(n-k+1): 1<=k<=n). [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 05 2009]`
	EXAMPLE	`6=2+4=5+1, thus a(6)=2.`
	CROSSREFS	`Cf. A064233.` `Sequence in context: A146061 A135936 A109707 this_sequence A117479 A118404 A089339` `Adjacent sequences: A064269 A064270 A064271 this_sequence A064273 A064274 A064275`
	KEYWORD	`nonn,new`
	AUTHOR	`Vladeta Jovovic (vladeta(AT)eunet.rs), Sep 23 2001`

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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.

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