login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A014730 Squares of odd Lucas numbers. 0
1, 9, 49, 121, 841, 2209, 15129, 39601, 271441, 710649, 4870849, 12752041, 87403801, 228826129, 1568397609, 4106118241, 28143753121, 73681302249, 505019158609, 1322157322201, 9062201101801, 23725150497409, 162614600673849, 425730551631121, 2918000611027441 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

Index entries for linear recurrences with constant coefficients, signature (0,17,0,17,0,-1).

FORMULA

a(n) = 17*a(n-2)+17*a(n-4)-a(n-6). - R. J. Mathar, Feb 10 2012

G.f.: -(x-1)*(x^4+10*x^3+42*x^2+10*x+1) / ((x^2-4*x-1)*(x^2+1)*(x^2+4*x-1)). - Colin Barker, May 14 2014

PROG

(PARI) Vec(-(x-1)*(x^4+10*x^3+42*x^2+10*x+1)/((x^2-4*x-1)*(x^2+1)*(x^2+4*x-1)) + O(x^100)) \\ Colin Barker, May 14 2014

CROSSREFS

Cf. A014447, A081069.

Sequence in context: A138998 A016838 A087691 * A212503 A295019 A164343

Adjacent sequences:  A014727 A014728 A014729 * A014731 A014732 A014733

KEYWORD

nonn,easy

AUTHOR

Mohammad K. Azarian

EXTENSIONS

More terms from Colin Barker, May 14 2014

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 May 19 10:36 EDT 2019. Contains 323390 sequences. (Running on oeis4.)