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A238750 as a triangular array

1
01
011
0211
04321
0107531
02620141141
0765644311951
0232182139106692961
07645894753512651274171
026202088165813039715832095581

A238750 as a square array

10000000000
11241026762327642620
113720561825892088
12514441394751658
1311311063511303
141969265971
1529127583
1641209
1755
18
1
10000000000
11241026762327642620
113720561825892088
12514441394751658
1311311063511303
141969265971
1529127583
1641209
1755
18
1