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A141200 as a simple table

n a(n)
1 1
2 1
3 2
4 6
5 20
6 72
7 272
8 1065
9 4282
10 17576
11 73344
12 310226
13 1327036
14 5730948
15 24952776
16 109417672
17 482779032
18 2141832444
19 9548501992
20 42753897498
21 192184437012
22 866963862560
23 3923596330784
24 17809292215406
25 81055344516420

[1,1,2,6,20,72,272,1065,4282,17576,73344,310226,
 1327036,5730948,24952776,109417672,482779032,
 2141832444,9548501992,42753897498,192184437012,
 866963862560,3923596330784,17809292215406,
 81055344516420]

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Last modified April 19 02:04 EDT 2024. Contains 371782 sequences. (Running on oeis4.)