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A251636 as a triangular array

1
-11
-211
-4031
-8-4651
-16-1681671
-32-480403091
-64-128-488010048111
-128-320-22411228019670131
-256-768-768067267233696151
-512-1792-2304-768134420161344528126171

A251636 as a square array

1-1-2-4-8-16-32-64-128-256-512
110-4-16-48-128-320-768-1792
13680-48-224-768-2304
151640801120-768
17301002806721344
19481966722016
111703361344
11396528
115126
117
1
1-1-2-4-8-16-32-64-128-256-512
110-4-16-48-128-320-768-1792
13680-48-224-768-2304
151640801120-768
17301002806721344
19481966722016
111703361344
11396528
115126
117
1