A147601 - OEIS

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A147601

First differences of A132355.

7, 4, 21, 8, 35, 12, 49, 16, 63, 20, 77, 24, 91, 28, 105, 32, 119, 36, 133, 40, 147, 44, 161, 48, 175, 52, 189, 56, 203, 60, 217, 64, 231, 68, 245, 72, 259, 76, 273, 80, 287, 84, 301, 88, 315, 92, 329, 96, 343, 100, 357 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,1`
	LINKS	`Index to sequences with linear recurrences with constant coefficients, signature (0,2,0,-1).`
	FORMULA	`G.f. ( 7+4x+7x^2 ) / ( (x-1)^2(1+x)^2 ). - R. J. Mathar, Jun 21 2011` `a(2n) = A147587(n). a(2n+1) = 4(n+1).`
	CROSSREFS	`Sequence in context: A070406 A181138 A063632 * A075536 A085047 A070427` `Adjacent sequences: A147598 A147599 A147600 * A147602 A147603 A147604`
	KEYWORD	`nonn,easy`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), Nov 08 2008`

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Last modified February 17 18:01 EST 2012. Contains 206061 sequences.