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A289951 as a simple table

n a(n)
6 15
7 315
8 4480
9 56672
10 703430
11 8941790
12 118685336
13 1658897240
14 24494859389
15 382301179169
16 6302039460704
17 109568927676192
18 2005758201911884
19 38588518087076860
20 778794884783432176
21 16458419973887378416
22 363578176719852275467
23 8381709371219530604071

[15,315,4480,56672,703430,8941790,118685336,
 1658897240,24494859389,382301179169,6302039460704,
 109568927676192,2005758201911884,
 38588518087076860,778794884783432176,
 16458419973887378416,363578176719852275467,
 8381709371219530604071]

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Last modified January 27 16:37 EST 2022. Contains 350611 sequences. (Running on oeis4.)