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 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 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

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Last modified December 17 06:45 EST 2018. Contains 318192 sequences. (Running on oeis4.)