id:A138653 - OEIS Search Results

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a(n)=3a(n-1)-3a(n-2)+a(n-3)+a(n-4).

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1, 2, 4, 8, 15, 27, 48, 86, 156, 285, 521, 950, 1728, 3140 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`Sequence is identical to its shifted third differences.`
	CROSSREFS	`Cf. A098057, A003522.` `Sequence in context: A000126 A098057 A074029 this_sequence A054159 A056181 A101976` `Adjacent sequences: A138650 A138651 A138652 this_sequence A138654 A138655 A138656`
	KEYWORD	`nonn`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), May 15 2008`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.