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A218566 as a triangular array

0
13
212240
3271080226800
448288012096003657830400
57560003780000228614400001267438233600000
610810800907200082301184000912555528192000011274806061917798400000

A218566 as a square array

0123456
312274875108
24010802880600010800
226800120960037800009072000
36578304002286144000082301184000
12674382336000009125555281920000
11274806061917798400000

A218566 as an upper right triangle

0123456
312274875108
24010802880600010800
226800120960037800009072000
36578304002286144000082301184000
12674382336000009125555281920000
11274806061917798400000

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)