Riordan array

A Riordan array is an infinite lower triangular matrix, $D$ , constructed out of two formal power series, $d(t)$ and $h(t)$ , in such a way that $d_{n,k} = [t^n]d(t)\left(t h(t)\right)^k$ .

References

Sprugnoli, Renzo, An Introduction to Mathematical Methods in Combinatorics (PDF)

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.