id:A113844 - OEIS Search Results

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a(1) =a(2) =1. a(n+1) = (sum{1<=k<=n/2} a(k)) * (sum{n/2<j<=n} a(j)).

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1, 1, 1, 2, 6, 18, 78, 312, 2070, 12420, 163878, 1966536, 62213526, 1866405780, 206591803854, 22311914816232, 9436063264020024, 3963146570888410080, 9887814229774042889370, 24620657432137366794531300 (list; graph; listen)

	OFFSET	`1,4`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	EXAMPLE	`a(8) = (a(1)+a(2)+a(3)) * (a(4)+a(5)+a(6)+a(7)) =` `(1+1+1) * (2+6+18+78) = 312.`
	CROSSREFS	`Sequence in context: A007116 A079391 A162058 this_sequence A141580 A007869 A118476` `Adjacent sequences: A113841 A113842 A113843 this_sequence A113845 A113846 A113847`
	KEYWORD	`easy,nonn`
	AUTHOR	`Leroy Quet Jan 24 2006`
	EXTENSIONS	`More terms from Evonne Haines (avissean(AT)adelphia.net), Jan 28 2006`

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

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