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3 equal products (Posted on 2018-11-21) Difficulty: 3 of 5
Lets take a number 12 as an example . It can be partitoned into three integer summands in 12 ways:
12=1+1+10
12=1+2+9
12=1+3+8
12=1+4+7
12=1+5+6
12=2+2+8
12=2+3+7
12=2+4+6
12=2+5+5
12=3+3+6
12=3+4+5
12=4+4+4

Multiplying the 3 members of each partitions results in 12 distinct numbers: 10,18,...60,64.

On the other hand the same treatment applied to number 13 produces a pair of equal results: 13=1+6+6=2+2+9 and 1*6*6=2*2*9=36 (a well known problem of children's ages).

Find the smallest number which has 3 distinct partitions into 3 parts, each of them with the same product.

Bonus: list all numbers below 1000 boasting this feature.

No Solution Yet Submitted by Ady TZIDON    
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re(3): Answer to the bonus. | Comment 8 of 10 |
(In reply to re(2): Answer to the bonus. by Charlie)

I managed to login to the OEIS site; I needed to go to a special login page to use the temporary password they sent, rather than the regular login page.


I've submitted a proposed edit to A119028 mentioning the results through 2000 and the conjecture that all integers beyond 102 are members.

  Posted by Charlie on 2018-11-23 11:26:49
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