[seqfan] A001353

Don Reble djr at nk.ca
Fri Oct 7 06:11:47 CEST 2016


> %C A001353 This sequence generates many brilliant (A078972) numbers...
> Is this a prime-free sequence?

    It's prime-free.
    A001353(2n) is even and composite.
    A001353(2n+1) = A001834(n) * A079935(n-1), either 1*1 or composite.

    (One could change the offset of A079935, but then many comments
     would be wrong. Unless they're already assuming offset zero. )-:

Don Reble  djr at nk.ca

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