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A293656 as a simple table

n a(n)
1 1
2 3
3 12
4 30
5 120
6 315
7 1344
8 3780
9 17280
10 51975
11 253440
12 810810
13 4193280
14 14189175
15 77414400
16 275675400
17 1579253760
18 5892561675
19 35300966400
20 137493105750
21 858370867200
22 3478575575475
23 22562891366400
24 94870242967500
25 637646929920000
26 2774954606799375

[1,3,12,30,120,315,1344,3780,17280,51975,253440,
 810810,4193280,14189175,77414400,275675400,
 1579253760,5892561675,35300966400,137493105750,
 858370867200,3478575575475,22562891366400,
 94870242967500,637646929920000,2774954606799375]

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Last modified April 25 05:56 EDT 2024. Contains 371964 sequences. (Running on oeis4.)