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A218907 as a triangular array

1
20
201
2021
20221
202421
2024241
20262622
202628262
20282821242
2028210214682
2021021021881463
20210212218102010103
2021221222212221420103
202122142221626162620124

A218907 as a square array

122222222222222
00000000000000
1222222222222
1244668810101212
12222222222
146881010121214
122222222
26121418182222
2468101216
2814202226
26101416
3102026
31020
312
4
122222222222222
00000000000000
1222222222222
1244668810101212
12222222222
146881010121214
122222222
26121418182222
2468101216
2814202226
26101416
3102026
31020
312
4