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A289953 as a simple table

n a(n)
10 945
11 45045
12 1344420
13 33093060
14 745860115
15 16201119935
16 348820952480
17 7567361882080
18 167057902281270
19 3775807346835342
20 87699348621850680
21 2098002630307972920
22 51760647309783259386
23 1317835530989933266850
24 34632875559239201852608
25 939407586052413176727424

[945,45045,1344420,33093060,745860115,16201119935,
 348820952480,7567361882080,167057902281270,
 3775807346835342,87699348621850680,
 2098002630307972920,51760647309783259386,
 1317835530989933266850,34632875559239201852608,
 939407586052413176727424]

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Last modified April 20 00:03 EDT 2024. Contains 371798 sequences. (Running on oeis4.)