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A071207 as a triangular array

1
11
441
272791
25625696161
312531251250250251
4665646656194404320540361
82354382354335294784035120051029491
167772161677721673400321835008286720286721792641
387420489

A071207 as a square array

1142725631254665682354316777216387420489
142725631254665682354316777216
19961250194403529477340032
1162504320840351835008
12554012005286720
136102928672
1491792
164
1
1142725631254665682354316777216387420489
142725631254665682354316777216
19961250194403529477340032
1162504320840351835008
12554012005286720
136102928672
1491792
164
1