id:A094025 - OEIS Search Results

Search: id:A094025

Displaying 1-1 of 1 results found.

page 1

Expansion of (1+3x)/((1-x^2)(1-3x^2)).

+0
3

1, 3, 4, 12, 13, 39, 40, 120, 121, 363, 364, 1092, 1093, 3279, 3280, 9840, 9841, 29523, 29524, 88572, 88573, 265719, 265720, 797160, 797161, 2391483, 2391484, 7174452, 7174453, 21523359, 21523360, 64570080, 64570081, 193710243, 193710244 (list; graph; listen)

	OFFSET	`0,2`
	FORMULA	`a(n)=4a(n-2)-3a(n-4); a(n)=3*3^(n/2)(1/4+sqrt(3)/4+(1/4-sqrt(3)/4)(-1)^n)+(-1)^n/2-1.`
	CROSSREFS	`Cf. A075427, A080610.` `Adjacent sequences: A094022 A094023 A094024 this_sequence A094026 A094027 A094028` `Sequence in context: A081837 A101404 A067327 this_sequence A070287 A124637 A047173`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 22 2004`

page 1

Search completed in 0.002 seconds

Last modified October 13 09:05 EDT 2008. Contains 145008 sequences.

AT&T Labs Research