A097320 error & a new related sequence
Leroy Quet
qq-quet at mindspring.com
Thu Sep 22 17:37:08 CEST 2005
In the example-line of sequence A097320 it says that 60 is in the
sequence.
But 60 is not among the terms given.
Since 60 contains 2 primes which divide it only once each, then the error
must be with the example line, since it seems that the author meant the
the exponents are strickly decreasing when read from left to right in the
prime factorizations of the terms of the sequence.
Maybe someone could calculate and submit the related sequence where n is
included if *at least one* exponent, when being read from left to right
(raising the lowest prime to raising the highest prime) in the prime
factorization of n, is less than the previous exponent.
For example, 90 is included in this new sequence because 90 = 2^1 * 3^2 *
5^1, and the exponent 2 is greater than the exponent 1 raising the 5.
thanks,
Leroy Quet
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