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A376276 as a triangular array

1
31
441
2341
85551
723451
91066661
611234561
10913777771
512122345671
16814158888881
1513111623456781
17715141899999991
1414101717234567891
18616131920101010

A376276 as a square array

134287961051615171418
1435210119128137146
14536213121411151016
15463721516141713
15647382181719
16574839220
1675849310
176859410
17869510
18796
1897
198
19
1
134287961051615171418
1435210119128137146
14536213121411151016
15463721516141713
15647382181719
16574839220
1675849310
176859410
17869510
18796
1897
198
19
1