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A276310 as a simple table

n a(n)
1 1
2 2
3 10
4 60
5 404
6 2912
7 21984
8 171600
9 1373680
10 11215776
11 93039648
12 781936896
13 6643741440
14 56973685760
15 492482782208
16 4286561051904
17 37536888622848
18 330471001126400
19 2923338431270400
20 25970490200202240
21 231607762146309120
22 2072719382680535040

[1,2,10,60,404,2912,21984,171600,1373680,11215776,
 93039648,781936896,6643741440,56973685760,
 492482782208,4286561051904,37536888622848,
 330471001126400,2923338431270400,
 25970490200202240,231607762146309120,
 2072719382680535040]

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Last modified February 25 19:39 EST 2021. Contains 341618 sequences. (Running on oeis4.)