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A291313 as a simple table

n a(n)
1 1
2 4
3 36
4 480
5 6896
6 106432
7 1718784
8 28718592
9 492201856
10 8605925376
11 152904727040
12 2752754089984
13 50106792767488
14 920624074653696
15 17051087289835520
16 318014241007730688
17 5967490401704681472
18 112584565019407941632
19 2134274190939740995584
20 40633890811539769786368
21 776619666947548902981632
22 14895370245374436645535744
23 286602399114033680102719488
24 5530627126602146509305675776
25 107011451193255026335799050240

[1,4,36,480,6896,106432,1718784,28718592,
 492201856,8605925376,152904727040,2752754089984,
 50106792767488,920624074653696,17051087289835520,
 318014241007730688,5967490401704681472,
 112584565019407941632,2134274190939740995584,
 40633890811539769786368,776619666947548902981632,
 14895370245374436645535744,
 286602399114033680102719488,
 5530627126602146509305675776,
 107011451193255026335799050240]

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Last modified May 3 19:56 EDT 2024. Contains 372222 sequences. (Running on oeis4.)