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!)
A030538 (2^n+2)*(2^n+4)*(4^n+9*2^n+38)/720. 1
1, 2, 6, 29, 219, 2295, 29359, 418847, 6323967, 98276543, 1549615167, 24613132095, 392371455295, 6266462052671, 100171654977855, 1602013024405823, 25626342538717503, 409974560964700479, 6559217646832380223, 104944479835032512831, 1679087657704374659391 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (31,-310,1240,-1984,1024).

FORMULA

G.f.: -(684*x^4-777*x^3+254*x^2-29*x+1) / ((x-1) * (2*x-1) * (4*x-1) * (8*x-1) * (16*x-1)). - Colin Barker, Aug 03 2013

MATHEMATICA

CoefficientList[Series[-(684 x^4 - 777 x^3 + 254 x^2 - 29 x + 1) / ((x - 1) (2 x - 1) (4 x - 1) (8 x-1) (16 x - 1)), {x, 0, 30}], x] (* Vincenzo Librandi, Aug 04 2013 *)

PROG

(MAGMA) [(2^n+2)*(2^n+4)*(4^n+9*2^n+38)/720: n in [0..20]]; // Vincenzo Librandi, Aug 04 2013

CROSSREFS

Sequence in context: A187006 A321961 A088957 * A326900 A181812 A330648

Adjacent sequences:  A030535 A030536 A030537 * A030539 A030540 A030541

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

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 February 23 16:09 EST 2020. Contains 332171 sequences. (Running on oeis4.)