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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103644 G.f. (3x+1)/(1+2x-6x^2-27x^3). 2
1, 1, 4, 25, 1, 256, 169, 1225, 5476, 961, 64009, 25600, 358801, 1164241, 515524, 15642025, 3243601, 101284096, 239228089, 216825625, 3736387876, 287336401, 27697946329, 47210598400 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

A floretion-generated sequence of squares.

This sequence is also related to several other sequences of squares.

LINKS

Table of n, a(n) for n=0..23.

Creighton Dement, Online Floretion Multiplier [From Creighton Dement, May 24 2009]

Index entries for linear recurrences with constant coefficients, signature (-2,6,27).

FORMULA

a(n+3) = -2a(n+2) + 6a(n+1) + 27a(n), a(0) = 1, a(1) = 1, a(2) = 4

a(n) = (1/11)*(2*3^n-(-5/2-(I*sqrt(11))/2)^n-(-5/2+(I*sqrt(11))/2)^n) [From Creighton Dement, May 24 2009]

PROG

Floretion Algebra Multiplication Program, FAMP.

CROSSREFS

Cf. A103645.

Sequence in context: A092435 A058230 A162187 * A185070 A272680 A082202

Adjacent sequences:  A103641 A103642 A103643 * A103645 A103646 A103647

KEYWORD

nonn,easy

AUTHOR

Creighton Dement, Feb 11 2005

EXTENSIONS

Corrected by T. D. Noe, Nov 07 2006

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 21 16:27 EST 2017. Contains 295003 sequences.