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A209727 as a triangular array

2
33
444
6556
87678
12988912
16131010101316
2417141212141724
322518161416182532
48332620181820263348
6449342822222228344964
966550363026263036506596

A209727 as a square array

2346812162432486496
34579131725334965
4568101418263450
678101216202836
89101214182230
12131416182226
161718202226
2425262830
32333436
484950
6465
96
2346812162432486496
34579131725334965
4568101418263450
678101216202836
89101214182230
12131416182226
161718202226
2425262830
32333436
484950
6465
96