411 REFERENCE · Wiktionary
Delannoy number
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
Named after French army officer and amateur mathematician Henri Delannoy.
Noun
en math The number of possible paths from the southwest corner (0, 0) of a rectangular grid to the northeast corner (m, n), using only single steps north, northeast, or east.
en eponyms