figshare
Browse

Extended Dataset Generated by the OEIS Integer Sequence A376895: Primes of the Form 3^k*k^3 + 2.

dataset
posted on 2024-12-23, 22:15 authored by Paul F. Marrero RomeroPaul F. Marrero Romero

This integer sequence was registered and published in the On-Line Encyclopedia of Integer Sequences (OEIS.org) Database on October 08 - 2024, under the OEIS code: A376895.

This sequence can be expressed with the help of a general formula that uses the OEIS-indexed sequence A366997
which are the integers n such that a(n) = 3n *n3 + 2 is a prime number. This general formula is such that:

a(n) = 3^A366997 * A366997^3 + 2.

Some interesting properties of this sequence are:

◼ The next term a(8) = ∼2.20847 x10143 is too large to include in the standard OEIS format.
◼ a(9) = ∼8.66244 x10153.
◼ a(10) = ∼9.21872 x10433.
◼ This sequence is constituted by primes of the forms A002145 and A002144, with the exception of 2.
◼ The last known integer k in A366997 is 20803 and corresponds to a(13) = ∼3.21988 x109938.

The numerical data showed on this dataset was generated by the following Mathematica program:

Select[Table[3^k*k^3+2, {k, 0, 10000}], PrimeQ]

The previous program was builded on Mathematica v13.3.0.

Note: More mathematical details, graphics and technical information can be found in the notebook (.nb) & pdf files provided in this data pack.

History