id:A138894 - OEIS Search Results

Search: id:A138894

Displaying 1-1 of 1 results found.

page 1

Expansion of (1+x)/(1-10x+9x^2).

+0
2

1, 11, 101, 911, 8201, 73811, 664301, 5978711, 53808401, 484275611, 4358480501, 39226324511, 353036920601, 3177332285411, 28595990568701, 257363915118311, 2316275236064801, 20846477124583211, 187618294121248901 (list; graph; listen)

	OFFSET	`0,2`
	COMMENT	`Orbit starting at 1 of A138893: a(n)=A138893^(n)(1). Partial sums of A003952.`
	FORMULA	`G.f.: (1+x)/((1-x)(1-9x)); a(n)=(5/4)*9^n-1/4; a(n)=A002452(n)+A002452(n+1);` `Bisection of A135522)/3. a(n+1)=9a(n)-2. - Paul Curtz (bpcrtz(AT)free.fr), Apr 22 2008`
	CROSSREFS	`Cf. a(n+1)=9a(n)-4 in A135423.` `Sequence in context: A045624 A125399 A037550 this_sequence A122105 A118937 A031997` `Adjacent sequences: A138891 A138892 A138893 this_sequence A138895 A138896 A138897`
	KEYWORD	`easy,nonn`
	AUTHOR	`Paul Barry (pbarry(AT)wit.ie), Apr 02 2008`

page 1

Search completed in 0.002 seconds

Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

AT&T Labs Research