id:A114113 - OEIS Search Results

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a(n) = sum{k=1 to n} (A114112(k)). (For n>=2, a(n) = sum{k=1 to n} (A014681(k)) =sum{k=1 to n} (A103889(k)).).

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1, 3, 7, 10, 16, 21, 29, 36, 46, 55, 67, 78, 92, 105, 121, 136, 154, 171, 191, 210, 232, 253, 277, 300, 326, 351, 379, 406, 436, 465, 497, 528, 562, 595, 631, 666, 704, 741, 781, 820, 862, 903, 947, 990, 1036, 1081, 1129, 1176, 1226, 1275, 1327, 1378, 1432 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) is not divisible by (A114112(n+1)).`
	FORMULA	`a(1)=1. a(2n) = n*(2n+1). a(2n+1) = 2n^2 +3n +2.`
	CROSSREFS	`Cf. A014681, A103889, A114112.` `Sequence in context: A085145 A121016 A088636 this_sequence A100056 A128223 A111244` `Adjacent sequences: A114110 A114111 A114112 this_sequence A114114 A114115 A114116`
	KEYWORD	`easy,nonn`
	AUTHOR	`Leroy Quet (qq-quet(AT)mindspring.com), Nov 13 2005`
	EXTENSIONS	`More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 31 2007`

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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