Postprint version. Published in Linear and Multilinear Algebra, Volume 10, Issue 3, January 1, 1981, pages 253-260.
The definitive version is available at https://doi.org/10.1080/03081088108817417.
A new statistic, the r-major index, is defined for sequences. A linear recurrence is then derived that enumerates sequences by r-descent number and r-major index.
1981 Taylor & Francis.
This is an electronic version of an article published in Linear and Multilinear Algebra .