Amicable quadruples: the numbers c referred to in A036471.
3461040, 4150440, 4918320, 5475960, 5920200, 6421800, 6768720, 7559640
3 seqfan posts
Thu Nov 27 17:13:00 CET 2008 [seqfan] Re: Sigma(x)=Sigma(y)=Sigma(z)=Sigma(u)=Sigma(v)=x+y+z+u+v
Thu Nov 27 17:13:00 CET 2008 [seqfan] Re: Sigma(x)=Sigma(y)=Sigma(z)=Sigma(u)=Sigma(v)=x+y+z+u+v
Thu Nov 27 14:37:25 CET 2008 [seqfan] Re: Sigma(x)=Sigma(y)=Sigma(z)=Sigma(u)=Sigma(v)=x+y+z+u+v
Index of A-numbers in seqfan: by ascending order
by month
by frequency
by keyword
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