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!)
A018835 Minimal number of smaller integer-sided squares that tile an n X n square. 3
4, 6, 4, 8, 4, 9, 4, 6, 4, 11, 4, 11, 4, 6, 4, 12, 4, 13, 4, 6, 4, 13, 4, 8, 4, 6, 4, 14, 4, 15, 4, 6, 4, 8, 4, 15, 4, 6, 4, 15, 4, 16, 4, 6, 4, 16, 4, 9, 4, 6, 4, 16, 4, 8, 4, 6, 4, 17, 4, 17, 4, 6, 4, 8, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

Sascha Kurz has found a(n) for n <= 104, and up to this point he observes that a(n) is given by a(n) = min{ a(p) | p prime, p divides n } (cf. A211302). - N. J. A. Sloane, Apr 07 2012

REFERENCES

S. Kurz, Squaring the square with integer linear programming, http://www.wm.uni-bayreuth.de/fileadmin/Sascha/Publikationen2/square.pdf

LINKS

Ed Wynn, Table of n, a(n) for n = 2..126

Ed Wynn, Exhaustive generation of Mrs Perkins's quilt square dissections for low orders, 2013; arXiv:1308.5420

CROSSREFS

Cf. A211302.

Sequence in context: A084892 A245556 A256318 * A055166 A202243 A130762

Adjacent sequences:  A018832 A018833 A018834 * A018836 A018837 A018838

KEYWORD

nonn,more

AUTHOR

David W. Wilson

EXTENSIONS

Extended by David W. Wilson, using values from A211302

b-file from Wynn, 2013, added by N. J. A. Sloane, Nov 29 2013

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 19 10:44 EST 2017. Contains 294936 sequences.