OFFSET
0,1
COMMENTS
Quotation from the reference: "Which rectangles with integer sides (in some unit) have the property that the area and the perimeter are (numerically) equal? It is not difficult to prove that there are precisely two rectangles with integer sides (in some unit of length) that have the property that the area and perimeter are numerically equal, namely 4 × 4 and 3 × 6".
REFERENCES
Greer, Brian & Bock, Dirk De & Dooren, Wim Van, The ISIS Problem and Pre-Service Teachers’ Ideas about Proof, in Proceedings of the ICMI Study 19 conference: Proof and Proving in Mathematics Education 1-184
MATHEMATICA
a[i_, j_] := i*j - 2i - 2j; Table[a[i - j + 1, j], {i, 1, 14}, {j, 1, i}] // Flatten
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Jean-François Alcover, Jan 08 2013
STATUS
approved