Constitutive counting functions for primorials.

A363061, A363844.
Written by Michael Thomas De Vlieger, St. Louis, Missouri, 2023 0621.

Abstract.

We present several multiplicatively constitutive counting functions applied to primorials. Primorials represent local minima of Euler’s totient φ(n), while they occur among local maxima of the regular counting function θ(n) = A010846(n).

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Concerns OEIS sequences:

A000005, A000010, A000040, A000079, A002110, A005867, A010846, A027750, A038566, A133995, A162306, A243822, A243823, A272618, A272619, A363061, A363844..

To cite:

Michael Thomas De Vlieger, Constitutive counting functions for primorials, Simple Sequence Analysis, Article 20230621.