Mrs. Perkins' Quilt
The Dissection of a Square of side 
into a number 
of smaller squares. Unlike a Perfect SquareDissection, however, the smaller Squares need not be all different sizes. In addition, only primedissections are considered so that patterns which can be dissected on lower order Squares are not permitted. The smallest number of Relatively Prime dissections of an 
quilt for 
, 2, ..., are 1, 4, 6, 7, 8, 9,9, 10, 10, 11, 11, 11, 11, 12, ... (Sloane's A005670).
References
Conway, J. H. ``Mrs. Perkins's Quilt.'' Proc. Cambridge Phil. Soc. 60, 363-368, 1964. Dudeney, H. E. Problem 173 in Amusements in Mathematics. New York: Dover, 1917. Dudeney, H. E. Problem 177 in 536 Puzzles & Curious Problems. New York: Scribner, 1967. Gardner, M. ``Mrs. Perkins' Quilt and Other Square-Packing Problems.'' Ch. 11 in Mathematical Carnival: A New Round-Up of Tantalizers and Puzzles from Scientific American. New York: Vintage, 1977. Sloane, N. J. A. SequenceA005670/M3267in ``An On-Line Version of the Encyclopedia of Integer Sequences.''http://www.research.att.com/~njas/sequences/eisonline.html and Sloane, N. J. A. and Plouffe, S.The Encyclopedia of Integer Sequences. San Diego: Academic Press, 1995. Trustrum, G. B. ``Mrs. Perkins's Quilt.'' Proc. Cambridge Phil. Soc. 61, 7-11, 1965.
- Starr Rose
- State Space
- Stationary Point
- Stationary Tangent
- Stationary Value
- Statistic
- Statistical Test
- Statistics
- Staudt-Clausen Theorem
- Steenrod Algebra
- Steenrod-Eilenberg Axioms
- Steenrod's Realization Problem
- Steepest Descent Method
- Steffensen's Inequality
- Steffenson's Formula
- Steinbach Screw
- Steiner Chain
- Steiner Construction
- Steinerian Curve
- Steiner-Lehmus Theorem
- Steiner Points
- Steiner Quadruple System
- Steiner's Ellipse
- Steiner Set
- Steiner's Hypocycloid