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A257619 as a triangular array

1
22
4444
85645648
16643622560643616
32714046378446378447140432
6478694815470232369949521547023278694864
1288660012346391196166072242416607224243463911968660012128

A257619 as a square array

1248163264128
2445646436714047869488660012
45642256063784415470232346391196
86436637844369949521660722424
1671404154702321660722424
32786948346391196
648660012
128

A257619 as an upper right triangle

1248163264128
2445646436714047869488660012
45642256063784415470232346391196
86436637844369949521660722424
1671404154702321660722424
32786948346391196
648660012
128

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Last modified February 23 16:27 EST 2020. Contains 332177 sequences. (Running on oeis4.)