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A260609 as a triangular array

40
5858
125118125
241250250241
525532610532525
102911361334133411361029
2246248033433388334324802246
44075418751687368736751654184407
9592117761906922944261482294419069117769592

A260609 as a square array

40581252415251029224644079592
5811825053211362480541811776
12525061013343343751619069
24153213343388873622944
52511363343873626148
10292480751622944
2246541819069
440711776
9592

A260609 as an upper right triangle

40581252415251029224644079592
5811825053211362480541811776
12525061013343343751619069
24153213343388873622944
52511363343873626148
10292480751622944
2246541819069
440711776
9592

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Last modified September 20 13:56 EDT 2021. Contains 347586 sequences. (Running on oeis4.)