The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A167477 Expansion of (1-3x+5x^2-x^3)/(1-3x+x^2)^2. 2
 1, 3, 12, 44, 149, 479, 1487, 4503, 13386, 39226, 113641, 326173, 928957, 2628459, 7395624, 20708264, 57739517, 160391483, 444068171, 1225831551, 3374848806, 9268963318, 25401364177, 69472849849, 189661024249, 516904018899 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Hankel transform of A033297 (when this starts 1,1,4,...). LINKS G. C. Greubel, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (6,-11,6,-1). FORMULA a(n) = 4*A001871(n-1) - A001871(n) + A001519(n+2). - R. J. Mathar, Jun 28 2011 MATHEMATICA LinearRecurrence[{6, -11, 6, -1}, {1, 3, 12, 44}, 100] (* G. C. Greubel, Jun 13 2016 *) CROSSREFS Sequence in context: A290918 A012873 A282082 * A190051 A220633 A296225 Adjacent sequences:  A167474 A167475 A167476 * A167478 A167479 A167480 KEYWORD easy,nonn AUTHOR Paul Barry, Nov 04 2009 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 May 18 09:14 EDT 2021. Contains 343995 sequences. (Running on oeis4.)