id:A098576 - OEIS Search Results

Search: id:A098576

Displaying 1-1 of 1 results found.

page 1

Sum C(n-2k,2k)3^k, k=0..floor(n/4).

+0
3

1, 1, 1, 1, 4, 10, 19, 31, 55, 109, 220, 424, 793, 1489, 2845, 5473, 10480, 19954, 37963, 72391, 138259, 263989, 503608, 960400, 1831969, 3495505, 6669865, 12725425, 24276892, 46314874, 88362451, 168586303, 321640831, 613639981, 1170726484 (list; graph; listen)

	OFFSET	`0,5`
	FORMULA	`G.f.: (1-x)/((1-x)^2-3x^4); a(n)=2a(n-1)-a(n-2)+3a(n-4).`
	CROSSREFS	`Cf. A097116, A098575.` `Sequence in context: A007077 A009895 A027371 this_sequence A063773 A034966 A009868` `Adjacent sequences: A098573 A098574 A098575 this_sequence A098577 A098578 A098579`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Sep 16 2004`

page 1

Search completed in 0.002 seconds

Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

AT&T Labs Research