In the May 2009 Word Ways, Susan Thorpe introduced the concept of a triangular progression. Partition a six-letter word into groups of one, two and three letters. Calculate the numerical value of each group, and determine the difference between groups two and one, and three and two. The object is to find words for which the differences are constant.
Eckler, A. Ross
"Ten-Letter Triangular Progressions,"
Word Ways: Vol. 42
, Article 4.
Available at: http://digitalcommons.butler.edu/wordways/vol42/iss3/4