id:A099324 - OEIS Search Results

Search: id:A099324

Displaying 1-1 of 1 results found.

page 1

Expansion of (1+sqrt(1+4x))/(2(1+x)).

+0
2

1, 0, -1, 3, -8, 22, -64, 196, -625, 2055, -6917, 23713, -82499, 290511, -1033411, 3707851, -13402696, 48760366, -178405156, 656043856, -2423307046, 8987427466, -33453694486, 124936258126, -467995871776, 1757900019100, -6619846420552, 24987199492704, -94520750408708 (list; graph; listen)

	OFFSET	`0,4`
	COMMENT	`Binomial transform is A099323. Second binomial transform is A072100.` `Hankel transform is A049347. [From Paul Barry (pbarry(AT)wit.ie), Aug 10 2009]`
	FORMULA	`a(n)=sum{k=0..2n, (20^(2n-k)-1)C(k,floor(k/2))}. [From Paul Barry (pbarry(AT)wit.ie), Aug 10 2009]`
	CROSSREFS	`Cf. A014138.` `Sequence in context: A164934 A047926 A014138 this_sequence A117420 A003101 A064443` `Adjacent sequences: A099321 A099322 A099323 this_sequence A099325 A099326 A099327`
	KEYWORD	`easy,sign`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Oct 12 2004`

page 1

Search completed in 0.002 seconds

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research