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A257251 as a triangular array

2
26
2620
261042
262028110
26101422156
2620284452272
261014222634342
26202844526876506
2610426678102114138812
262014222634384658930
26104266781021141381741861332

A257251 as a square array

222222222222
66666666666
20102010201020102010
422814281428421442
11022442244662266
156522652782678
272346810234102
3427611438114
50613846138
81258174
930186
1332

A257251 as an upper right triangle

222222222222
66666666666
20102010201020102010
422814281428421442
11022442244662266
156522652782678
272346810234102
3427611438114
50613846138
81258174
930186
1332

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Last modified September 29 21:59 EDT 2020. Contains 337432 sequences. (Running on oeis4.)