In a companion article, Michael Keith discusses the problem of packing the cardinals ONE, TWO, THREE, ... N into various square of rectangular grids of minimum size. This article extends some of his ideas, showing that such grids come in several varieties.
Eckler, A. Ross
"Packing The Cardinals,"
Word Ways: Vol. 32
, Article 6.
Available at: http://digitalcommons.butler.edu/wordways/vol32/iss3/6