login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A110329 Diagonal sums of a number triangle related to the Pell numbers. 1
1, 2, 11, 76, 727, 8694, 125221, 2107448, 40577501, 879557050, 21193809151, 561950634852, 16258832340451, 509717865337646, 17211690137010377, 622780718533047664, 24039198822957409081, 985985136339748008498 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Diagonal sums of A110327.

LINKS

Table of n, a(n) for n=0..17.

FORMULA

a(n)=sum{k=0..floor(n/2), (n-k)!*Pell(n-2k+1)/k!}

CROSSREFS

Cf. A000129.

Sequence in context: A209101 A118802 A053481 * A221844 A006766 A120380

Adjacent sequences:  A110326 A110327 A110328 * A110330 A110331 A110332

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Jul 20 2005

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified December 18 04:30 EST 2014. Contains 252079 sequences.