This site is supported by donations to The OEIS Foundation.

 Annual Appeal: Please make a donation to keep the OEIS running. In 2018 we replaced the server with a faster one, added 20000 new sequences, and reached 7000 citations (often saying "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A078028 Expansion of (1-x)/(1-x^2+2*x^3). 4
 1, -1, 1, -3, 3, -5, 9, -11, 19, -29, 41, -67, 99, -149, 233, -347, 531, -813, 1225, -1875, 2851, -4325, 6601, -10027, 15251, -23229, 35305, -53731, 81763, -124341, 189225, -287867, 437907, -666317, 1013641, -1542131, 2346275, -3569413, 5430537, -8261963, 12569363, -19123037, 29093289 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Number of compositions of n into parts congruent to (0,2} mod 3 (offset 2). - Vladeta Jovovic, Feb 09 2005 LINKS Index entries for linear recurrences with constant coefficients, signature (0,1,-2). PROG (PARI) Vec((1-x)/(1-x^2+2*x^3)+O(x^99)) \\ Charles R Greathouse IV, Sep 25 2012 CROSSREFS Sequence in context: A072706 A117433 A159284 * A317142 A279375 A245143 Adjacent sequences:  A078025 A078026 A078027 * A078029 A078030 A078031 KEYWORD sign,easy AUTHOR N. J. A. Sloane, Nov 17 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
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 13 10:19 EST 2018. Contains 318086 sequences. (Running on oeis4.)