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 Does it continue? 3: Growing table of primes (Posted on 2017-09-19)
Before trying the problem "note your opinion as to whether the observed pattern is known to continue, known not to continue, or not known at all."

After row 1, row n is obtained by inserting n between every pair of consecutive numbers that sum to n.

```row 1:                  1 1
row 2:                 1 2 1
row 3:               1 3 2 3 1
row 4:            1 4 3  2  3 4 1
row 5:        1 5 4  3 5 2 5 3 4 5 1
row 6:   1  6  5 4  3 5  2  5  3  4 5  6 1
row 7: 1 7 6 5 4 7 3 5 7 2 7 5 3 7 4 5 6 7 1
```
The number of numbers in each row are 2, 3, 5, 7, 11, 13, 19...

Will they always be prime?

 No Solution Yet Submitted by Jer No Rating

 Subject Author Date A classic puzzle Brian Smith 2017-09-19 23:23:09 Prediction and result. broll 2017-09-19 22:26:08 first thought and computer vindication Charlie 2017-09-19 10:54:29

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