id:A107393 - OEIS Search Results

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a(n)=-1 iff n is a prime, a(n)= 1 iff n is equal to the sum of three primes, a(n)= 2 iff n is equal to the sum of two primes, else a(n)= 0.

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0, 0, -1, -1, 2, -1, 2, -1, 2, 0, 2, -1, 2, -1, 2, 1, 2, -1, 2, -1, 2, 1, 2, -1, 2, 1, 2, 1, 2, -1, 2, -1, 2, 1, 2, 1, 2, -1, 2, 1, 2, -1, 2, -1, 2, 1, 2, -1, 2, 1, 2, 1, 2, -1, 2, 1, 2, 1, 2, -1, 2, -1, 2, 1, 2, 1, 2, -1, 2, 1, 2, -1, 2, -1, 2, 1, 2, 1, 2, -1, 2, 1, 2, -1, 2, 1, 2, 1, 2, -1, 2, 1, 2, 1, 2, 1, 2, -1, 2, 1, 2, -1, 2, -1 (list; graph; listen)

	OFFSET	`0,5`
	CROSSREFS	`Sequence in context: A060024 A143668 A029445 this_sequence A047885 A072731 A129174` `Adjacent sequences: A107390 A107391 A107392 this_sequence A107394 A107395 A107396`
	KEYWORD	`sign`
	AUTHOR	`Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), May 25 2005`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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