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A049424 as a triangular array

1
41
12121
2496241
24600360401
030244200960601
01209640824176402100841
0362883386882701445544040321121
07257624071043580416121262414414470561441
0725761451520041791680

A049424 as a square array

1412242400000
11296600302412096362887257672576
124360420040824338688240710414515200
14096017640270144358041641791680
1602100554401212624
1844032144144
11127056
1144
1
1412242400000
11296600302412096362887257672576
124360420040824338688240710414515200
14096017640270144358041641791680
1602100554401212624
1844032144144
11127056
1144
1