The story
Introduced by Narumi (1929).
Etymology from Wiktionary, CC BY-SA 4.0.
Narumi polynomial
Today it means: Any of a group of polynomials sₙ(x) given by the generating function displaystyle ∑s_n(x)tⁿ/n!=(t/(log (1+t)))ᵃ(1+t)ˣ. Full definition →