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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A093380 Expansion of (1+4x+x^2-10x^3)/((1-x)(1-x-2x^2)). 2
1, 6, 14, 22, 46, 86, 174, 342, 686, 1366, 2734, 5462, 10926, 21846, 43694, 87382, 174766, 349526, 699054, 1398102, 2796206, 5592406, 11184814, 22369622, 44739246, 89478486, 178956974, 357913942, 715827886, 1431655766, 2863311534 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Second binomial transform is A093381.

LINKS

Table of n, a(n) for n=0..30.

Index entries for linear recurrences with constant coefficients, signature (2,1,-2)

FORMULA

a(n)=2-5*0^n+4(2*2^n/3+(-1)^n/3); a(n)=2-5*0^n+4*A001045(n+1).

CROSSREFS

Sequence in context: A211998 A190522 A079797 * A123228 A015832 A190753

Adjacent sequences:  A093377 A093378 A093379 * A093381 A093382 A093383

KEYWORD

easy,nonn

AUTHOR

Paul Barry, Apr 28 2004

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 13 04:54 EDT 2020. Contains 336442 sequences. (Running on oeis4.)