\input zb-basic
\input zb-ioport
\iteman{io-port 03745172}
\itemau{Rawlings, Don}
\itemti{The r-major index.}
\itemso{J. Comb. Theory, Ser. A 31, 175-183 (1981).}
\itemcc{}
\itemut{permutation statistic; r-Eulerian numbers}
\itemli{doi:10.1016/0097-3165(81)90013-3}
\end