
COMMENTS

a(n) is the minimum y that satisfies x <= y and the GCD of (x,y),(x+1,y), ..., (x+n1,y), (x,y+1),(x+1,y+1), ..., (x+n1,y+1), ..., (x,y+n1),(x+1,y+n1), ..., (x+n1,y+n1) are all larger than 1.


REFERENCES

Stephen Wolfram, A New Kind of Science, Wolfram Media, 2002, p. 1093.


EXAMPLE

a(2)=20 because the GCDs of (14,20), (15,20), (14,21), (15,21) are all larger than 1, and there is no such array within x <= y < 20.
