login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A131621 Sum of all n-digit Pell numbers. 0
8, 111, 1562, 8119, 128103, 665857, 10506008, 147830751, 768398401, 12123924128, 63018038201, 994309609247, 13990997937704, 72722761475561, 1147432427450279, 5964153172084899, 94103450048860582, 1324136026968012719, 6882627592338442563, 108595299810873229246 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
Sum of all 1-digit Pell numbers is 8.
Sum of all 2-digit Pell numbers is 111.
Sum of all 3-digit Pell numbers is 1562.
MATHEMATICA
With[{pnos=LinearRecurrence[{2, 1}, {0, 1}, 500]}, Table[Total[ Select[ pnos, IntegerLength[#]==n&]], {n, 20}]] (* Harvey P. Dale, Jun 13 2011 *)
CROSSREFS
Cf. A000129.
Sequence in context: A020560 A144813 A079660 * A364983 A239754 A003721
KEYWORD
nonn,base
AUTHOR
Parthasarathy Nambi, Sep 01 2007
EXTENSIONS
More terms from Harvey P. Dale, Jun 13 2011
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 10:44 EDT 2024. Contains 371268 sequences. (Running on oeis4.)