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A290818 as a triangular array

2
33
4114
524245
64794476
788272272887
816377411857741638
930422304280428022303049
105756542157812010615781654257510
111104194526060488512885126060419452110411

A290818 as a square array

234567891011
3112447881633045751104
424942727742230654219452
547272118542801578160604
68877442802010688512
716322301578188512
8304654260604
957519452
101104
11
234567891011
3112447881633045751104
424942727742230654219452
547272118542801578160604
68877442802010688512
716322301578188512
8304654260604
957519452
101104
11