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A338403 as a triangular array

1
23
52314
1413123384
4266423392367594
13231661852036265247144719
4291454512751140831152775726621940898

A338403 as a square array

1251442132429
323131664316614545
14233233918520127511
84236736265408311
59424714527757
4719266219
40898
1251442132429
323131664316614545
14233233918520127511
84236736265408311
59424714527757
4719266219
40898