In t he February 1993 Word Ways, David Morice wrote about crossnumber forms, a rule-governed arrangement of grids composed of numbers that are spelled out. the goal in crossnumber forms is to discover nontrivial patterns of horizontal and vertical interconnectedness, as in two of Morice's simple but elegant examples:
Word Ways: Vol. 26
, Article 11.
Available at: http://digitalcommons.butler.edu/wordways/vol26/iss4/11