id:A152718 - OEIS Search Results

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a(n) = 2*a(n-1)-a(n-2)+2*a(n-3)-a(n-4)+a(n-5), n>5.

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1, 1, 1, 1, 2, 4, 8, 16, 31, 60, 117, 228, 444, 865, 1685, 3282, 6393, 12453, 24257, 47250, 92038, 179280, 349218, 680239, 1325032, 2581019, 5027546, 9793116, 19075931, 37157851, 72379476, 140987393, 274628197, 534946033, 1042017030 (list; graph; listen)

	OFFSET	`0,5`
	COMMENT	`Conjecture: this is the inverse Motzkin transform of A054393.`
	FORMULA	`a(n)=1, n<4. a(4)=2, a(5)=4. a(n)=2*a(n-1)-a(n-2)+2a(n-3)-a(n-4)+a(n-5), n>5.`
	CROSSREFS	`Sequence in context: A118891 A107066 A141019 this_sequence A006775 A104993 A128761` `Adjacent sequences: A152715 A152716 A152717 this_sequence A152719 A152720 A152721`
	KEYWORD	`easy,nonn`
	AUTHOR	`R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Dec 11 2008`

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.

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