Observations on A100004
Robert G. Wilson v
rgwv at rgwv.com
Mon Nov 8 17:32:43 CET 2004
Tony is correct, something is wrong with the definition. The Mathematica coding
which conforms to the stated definition is Last[RotateRight[IntegerDigits[n, 2,
Max[1, Floor[Log[2, n] + 2]]], 1]] which yeilds the cyclic sequence beginning at
zero of {0, 0, 1, 1}. Bob.
T. D. Noe wrote:
>>It appears that, taking A100004:
>>a(n) = (-1/n), where (k/n) is the Kronecker symbol
>>
>>and replacing +1 with 0 and -1 with 1, we obtain A038189:
>>Bit to left of least significant bit in binary expansion of n.
>
>
> I believe A038189 is misnamed. It says the a(24) = 1, but 24 in binary is
> 11000, so we should have a(24) = 0. The comment says it is the
> characteristic function of A092130, which is also false. The formula also
> is not consistent with the description: a(2n) = a(n)?? Something is amiss
> here!
>
> Tony
>
More information about the SeqFan
mailing list