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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A033505 G.f.: 1/(1-3*x-x^2+x^3). 7
1, 3, 10, 32, 103, 331, 1064, 3420, 10993, 35335, 113578, 365076, 1173471, 3771911, 12124128, 38970824, 125264689, 402640763, 1294216154, 4160024536, 13371648999, 42980755379, 138153890600, 444070778180, 1427385469761 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

N. J. A. Sloane Notes on A030186 and A033505

Index entries for linear recurrences with constant coefficients, signature (3,1,-1).

CROSSREFS

Partial sums of A030186.

Sequence in context: A077826 A292398 A273351 * A063782 A071718 A261058

Adjacent sequences:  A033502 A033503 A033504 * A033506 A033507 A033508

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Feb 13 2002

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy .

Last modified November 23 21:46 EST 2017. Contains 295141 sequences.