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A251616 as a triangular array

826
1400814008
237566583034237566
403105624317054243170544031056
6837741010160457422500893370101604574268377410
116022885642444702494258178221074258178221074424447024941160228856

A251616 as a square array

826140082375664031056683774101160228856
1400858303424317054101604574242444702494
237566243170542500893370258178221074
40310561016045742258178221074
6837741042444702494
1160228856
826140082375664031056683774101160228856
1400858303424317054101604574242444702494
237566243170542500893370258178221074
40310561016045742258178221074
6837741042444702494
1160228856