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Triangle read by rows: n-th row contains n numbers whose product is a square; all numbers in triangle are distinct.
2

%I #8 Sep 11 2023 11:45:22

%S 1,2,8,3,4,12,5,7,10,14,6,9,15,18,20

%N Triangle read by rows: n-th row contains n numbers whose product is a square; all numbers in triangle are distinct.

%C Differs from A076031 and A076696.

%e (1) (2 8) (3 4 12) (5 7 10 14) (6 9 15 18 20)

%Y Cf. A076031, A076696.

%K nonn,tabl,more,obsc

%O 1,2

%A _Donald S. McDonald_, Nov 10 2002

%E It is not clear to me how one decides what numbers to place in the n-th row. Possibly the goal is to minimize the product of the terms in the n-th row? - _N. J. A. Sloane_, Nov 30 2002