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A140821 as a triangular array

2
24
246
6668
8128810
102020101012
12606060121214
1442707042141416
16112112280112112161618
1872504252252504721818

A140821 as a square array

222681012141618
4461220604211272
668206070112504
88106070280252
10101242112252
121214112504
14141672
161618
1818

A140821 as an upper right triangle

222681012141618
4461220604211272
668206070112504
88106070280252
10101242112252
121214112504
14141672
161618
1818

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Last modified November 30 05:12 EST 2021. Contains 349419 sequences. (Running on oeis4.)