With a(1) = 1, a(n) is the smallest number not already in the sequence such that a(n) + Product_{i=1..n-1} a(i) is a square.

A259256

With a(1) = 1, a(n) is the smallest number not already in the sequence such that a(n) + Product_{i=1..n-1} a(i) is a square.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =7a(4) =18a(5) =36a(6) =148a(7) =5625a(8) =351225a(9) =5350321a(10) =151875880681

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