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A304972 as a triangular array

1
11
111
1321
13521
1710931
1719161231
1153853341841
115659095462241
131130265261195803051
1312114406304612951003551
16342212211700169610165151554561
1636652002

A304972 as a square array

1111111111111
113377151531316363
12510193865130211422665
12916539026544012212002
131234952616301700
1318461954611696
1422802951016
1430100515
1535155
1545
16
1
1111111111111
113377151531316363
12510193865130211422665
12916539026544012212002
131234952616301700
1318461954611696
1422802951016
1430100515
1535155
1545
16
1