[seqfan] Does anyone recognise these number arrays?

[Brendan McKay]

I have some finite arrays of numbers that I am trying to identify.
They arise in the theory of graph reconstruction.   There is
a whole lot of them but I can’t give a general description.

One example:

330
120 210
36 168 126
8 84 168 70
1 28 126 140 35
5 60 150 100 15
15 100 150 60 5
35 140 126 28 1
70 168 84 8
126 168 36
210 120
330

Another:

210
84 126
28 112 70
7 63 105 35
1 24 90 80 15
5 50 100 50 5
15 80 90 24 1
35 105 63 7
70 112 28
126 84
210

Does this ring a bell for anyone?  Can anyone guess what they are?

Thanks, Brendan.