A076596 Triangle read by rows: n-th row contains n numbers whose product is a square; all numbers in triangle are distinct.

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

Offset

1,2

Comments

Differs from A076031 and A076696.

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Cf. A076031, A076696.

Sequence in context: A321984 A083486 A076031 * A081967 A076099 A199072

Adjacent sequences: A076593 A076594 A076595 * A076597 A076598 A076599

Keyword

nonn,tabl,more,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. Possibly the goal is to minimize the product of the terms in the n-th row? - N. J. A. Sloane, Nov 30 2002

Status

approved