[seqfan] Finitude of A161620

Hans Havermann pxp at rogers.com
Thu Dec 2 23:58:22 CET 2010

Let f (A060797) be the floor of the square root of primorial-k (k#,  
A002110). The sequence f*(f+1)-k# for k=1,2,3,.. begins  
The zeros place primorial numbers in A161620 which, as far as I am  
aware, has not been proven finite. Notwithstanding the start of this  
sequence and the subsequent sign-changes, the growth of the absolute  
values of its terms seems to me quite regular and seemingly  
inexorable. Couldn't this be shaped into a proof of a finite number of  

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