Bijections and the Riordan group

The encyclopedia of integer sequences

Choice Reviews Online · 1995 · 603 citations

Natural Sciences, Computer Science, Mathematics +17

The Riordan group

Louis W. Shapiro, Seyoum Getu, Wen-Jin Woan et al. · Discrete Applied Mathematics · 1991 · 495 citations

Riordan arrays and combinatorial sums

Renzo Sprugnoli · Discrete Mathematics · 1994 · 329 citations

Natural Sciences, Computer Science, Mathematics +11

ECO:a methodology for the enumeration of combinatorial objects

Elena Barcucci, Alberto Del Lungo, Elisa Pergola et al. · The Journal of Difference Equations and Applications · 1999 · 201 citations

Natural Sciences, Computer Science, Mathematics +13

Motzkin Numbers

Martin Aigner · European Journal of Combinatorics · 1998 · 113 citations