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A300437 as a triangular array

1
31
531
7831
9161131
1129251431
134758341731
157211096432031
17104206200143522331
19145346442317199612631
21195571822807461264702931
23256881156516131328632338793231

A300437 as a square array

1357911131517192123
13816294772104145195256
13112558110206346571881
131434962004428221565
1317431433178071613
1320521994611328
132361264632
132670338
132979
1332
13
1
1357911131517192123
13816294772104145195256
13112558110206346571881
131434962004428221565
1317431433178071613
1320521994611328
132361264632
132670338
132979
1332
13
1