This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A161909 Inverse binomial transform of A181586. 0
 0, 0, 1, -3, 7, -13, 23, -41, 79, -161, 335, -689, 1391, -2769, 5487, -10897, 21743, -43537, 87279, -174865, 349935, -699665, 1398511, -2795793, 5590767, -11182353, 22367983, -44740881, 89485039, -178966801, 357920495, -715821329, 1431629551, -2863272209, 5726596847 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS A181586(n) and successive differences:    0,  0,  1,  0,   1,  2,    0,  1, -1,  1,   1,  3,    1, -2,  2,  0,   2,  0,   -3,  4, -2,  2,  -2,  6,    7, -6,  4, -4,   8, -4, -13, 10, -8, 12, -12, 12. First column is a(n). LINKS Index to sequences with linear recurrences with constant coefficients, signature (-3,-2,2,4). FORMULA a(n+2)=( (2*a(n)+A077950(n)) signed) a(n)-a(n-1) = (-1)^n*A000749(n+2). G.f. -x^2 / ( (x-1)*(2*x+1)*(2*x^2+2*x+1) ). - R. J. Mathar, Feb 06 2011 CROSSREFS Sequence in context: A066624 A061761 A081494 * A173168 A048462 A048465 Adjacent sequences:  A161906 A161907 A161908 * A161910 A161911 A161912 KEYWORD sign,easy AUTHOR Paul Curtz, Jan 31 2011 STATUS approved

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

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