id:A024949 - OEIS Search Results

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a(n) = Sum(a(2i-1)*a(n-2i+1), i = 1,2,...,[ (n+2)/4 ]).

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1, 1, 4, 4, 4, 20, 36, 52, 132, 292, 580, 1252, 2628, 6772, 14820, 32404, 75012, 183108, 423428, 953924, 2225028, 5435604, 12770340, 29545076, 69900164, 170528612, 405553988, 954683428, 2267938244, 5585542964, 13382224612, 31793247188 (list; graph; listen)

	OFFSET	`4,3`
	CROSSREFS	`Sequence in context: A131946 A034896 A120914 this_sequence A059812 A077725 A111481` `Adjacent sequences: A024946 A024947 A024948 this_sequence A024950 A024951 A024952`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.

AT&T Labs Research