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URL: https://oeis.org/A076696

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A076696
Triangle read by rows: n-th row contains n numbers whose product is a square; all numbers in triangle are distinct.
2
1, 2, 8, 3, 7, 21, 4, 5, 6, 30, 9, 10, 12, 15, 18
OFFSET
1,2
COMMENTS
Second solution. Both solutions are smaller than A076031.
EXAMPLE
1^2 4^2 21^2 60^2 540^2 = (1)(2 8)(3 7 21)(4 5 6 30)(9 10 12 15 18)
CROSSREFS
Sequence in context: A190732 A081349 A111445 * A391666 A011057 A082236
KEYWORD
more,nonn,tabl,obsc
AUTHOR
Donald S. McDonald, Nov 10 2002
EXTENSIONS
It is not clear to me how one decides what numbers to place in the n-th row! - N. J. A. Sloane, Nov 30 2002
STATUS
approved