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math.CO2004
Counting occurrences of 3412 in an involution
Toufik Mansour
We study the generating function for the number of involutions on letters containing exactly $r\gs0$ occurrences of 3412. It is shown that finding this function for a given …
math.CO2004★ 1 cited
Involutions Restricted by 3412, Continued Fractions, and Chebyshev Polynomials
Eric Egge, Toufik Mansour
We study generating functions for the number of involutions, even involutions, and odd involutions in subject to two restrictions. One restriction is that the involution avoi…