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A156580 as a triangular array

1
11
121
1441
16761
18101081
110121312101
11214161614121
1141618191816141
116182022222018161
11820222425242220181
1202224262828262422201

A156580 as a square array

111111111111
12468101214161820
14710121416182022
1610131618202224
18121619222426
1101418222528
11216202428
114182226
1162024
11822
120
1
111111111111
12468101214161820
14710121416182022
1610131618202224
18121619222426
1101418222528
11216202428
114182226
1162024
11822
120
1