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A207290 as a triangular array

4
1616
6225662
24138443844241
9365808121695258081936
363687609612359893123598938760963636
141241322049670240128226634369307024012821322049614124
5486519948737639940889449

A207290 as a square array

4166224193636361412454865
1625638445808187609613220496199487376
6238442169521235989370240128239940889449
24158081123598932663436930
936876096702401282
363613220496
14124

A207290 as an upper right triangle

4166224193636361412454865
1625638445808187609613220496199487376
6238442169521235989370240128239940889449
24158081123598932663436930
936876096702401282
363613220496
14124

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Last modified April 25 10:34 EDT 2024. Contains 371967 sequences. (Running on oeis4.)