id:A079069 - OEIS Search Results

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

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1, 1, 1, 2, 2, 3, 6, 8, 21, 54, 176, 1155, 9558, 203456, 11040645, 1944642006, 2246285672576, 21470102051374515, 4368221476369196469462, 48227982626747161978326473216, 93786160880652497618461924784373935445 (list; graph; listen)

	OFFSET	`1,4`
	PROGRAM	`(PARI) a(n)=if(n<4, n>0, (1+a(n-2))*a(n-3))`
	CROSSREFS	`Cf. A078919.` `Sequence in context: A039870 A100948 A035571 this_sequence A019465 A077074 A163493` `Adjacent sequences: A079066 A079067 A079068 this_sequence A079070 A079071 A079072`
	KEYWORD	`nonn,easy`
	AUTHOR	`Michael Somos, Dec 22, 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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