id:A064799 - OEIS Search Results

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Sum of n-th prime number and n-th composite number.

+0
3

6, 9, 13, 16, 21, 25, 31, 34, 39, 47, 51, 58, 63, 67, 72, 79, 86, 89, 97, 103, 106, 113, 118, 125, 135, 140, 143, 149, 153, 158, 173, 179, 186, 189, 200, 203, 211, 218, 223, 230, 237, 241, 253, 256, 261, 264, 277, 291, 296, 299, 305, 313, 316, 327, 334, 341 (list; graph; listen)

	OFFSET	`0,1`
	REFERENCES	`Ivan Grischenko, ivansasha(AT)mtu-net.ru, private communication.`
	FORMULA	`a(n) = prime(n)+composite(n)`
	EXAMPLE	`E.g. a(1)=6 because first prime is 2 and first composite is 4. a(2)=9 because p(2)=3 and c(2)=6. Et cetera.`
	CROSSREFS	`Sequence in context: A106218 A118521 A095213 this_sequence A030499 A020751 A092949` `Adjacent sequences: A064796 A064797 A064798 this_sequence A064800 A064801 A064802`
	KEYWORD	`nonn,easy`
	AUTHOR	`Konstantin Knop (Konstantin(AT)Knop.com), Oct 21 2001`
	EXTENSIONS	`More terms from Larry Reeves (larryr(AT)acm.org), Nov 12 2001`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.

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