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A076596 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, 4, 12, 5, 7, 10, 14, 6, 9, 15, 18, 20 (list; table; graph; refs; listen; history; text; internal format)
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

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

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Last modified October 26 00:52 EDT 2021. Contains 348256 sequences. (Running on oeis4.)