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Date: 18-11-2019
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Date: 8-10-2020
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Date: 14-7-2020
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A number where the
s are distinct primes and
such that
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(1) |
for , 2, ...,
,
taken as 1, and with
and
some fixed integers. For example,
is a Zeisel number with
since
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(2) |
as is since
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(3) |
The first few Zeisel numbers are 105, 1419, 1729, 1885, 4505, ... (OEIS A051015), which correspond to constants (1, 2), (4, ), (1, 6), (2, 3), (3, 2), ....
REFERENCES:
MathPages. "Zeisel Numbers." https://www.mathpages.com/home/kmath015.htm.
Sloane, N. J. A. Sequence A051015 in "The On-Line Encyclopedia of Integer Sequences."
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