Ramanujan type trigonometric formulas: the general form for the argument .
Rearrangements of the Symmetric Group and Enumerative Properties of the Tangent and Secant Numbers.
Recurrence formulae for multi-poly-Bernoulli numbers.
Recurrences and Legendre transform.
Regularity properties of the Stern enumeration of the rationals.
Rekurrente Folgen mit lokal gleichmäßig beschränkter Primteileranzahl
Relations de récurrence modulo m
Repetitiveness in binary recurrences.
Résultants cycliques et polynômes cyclotomiques
Results on the ratios of the terms of second order linear recurrences
Řetězové zlomky [Book]
Running modulus recursions.