A138653 - OEIS

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A138653

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

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

	OFFSET	`0,2`
	FORMULA	`Sequence is identical to its shifted third differences.`
	CROSSREFS	`Cf. A098057, A003522.` `Sequence in context: A143281 A098057 A074029 * A054159 A056181 A101976` `Adjacent sequences: A138650 A138651 A138652 * A138654 A138655 A138656`
	KEYWORD	`nonn`
	AUTHOR	`Paul Curtz (bpcrtz(AT)free.fr), May 15 2008`

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Last modified February 17 03:45 EST 2012. Contains 205978 sequences.