id:A024957 - OEIS Search Results

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

+0
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2, 1, 1, 2, 4, 9, 20, 44, 97, 230, 540, 1257, 2920, 7168, 17393, 41806, 100408, 250098, 618124, 1517008, 3716627, 9375710, 23479016, 58419236, 145210076, 368786352, 931600246, 2341625080, 5877503872, 15027036202, 38225273720, 96794415372 (list; graph; listen)

	OFFSET	`4,1`
	CROSSREFS	`Sequence in context: A108746 A119558 A024735 this_sequence A153914 A151893 A000361` `Adjacent sequences: A024954 A024955 A024956 this_sequence A024958 A024959 A024960`
	KEYWORD	`nonn`
	AUTHOR	`Clark Kimberling (ck6(AT)evansville.edu)`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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