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A054619 as a simple table

n a(n)
1 1
2 2
3 6
4 3
5 12
6 33
7 4
8 20
9 72
10 280
11 5
12 30
13 135
14 660
15 3145
16 6
17 42
18 228
19 1344
20 7800
21 46956
22 7
23 56
24 357
25 2464
26 16835
27 118104
28 823585
29 8
30 72
31 528
32 4176
33 32800
34 262800
35 2097200
36 16781472
37 9
38 90
39 747
40 6660
41 59085
42 532350
43 4783023
44 43053480
45 387422001

[1,2,6,3,12,33,4,20,72,280,5,30,135,660,3145,6,42,
 228,1344,7800,46956,7,56,357,2464,16835,118104,
 823585,8,72,528,4176,32800,262800,2097200,
 16781472,9,90,747,6660,59085,532350,4783023,
 43053480,387422001]

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Last modified April 24 13:58 EDT 2024. Contains 371960 sequences. (Running on oeis4.)