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A032275 as a simple table

n a(n)
1 4
2 10
3 20
4 55
5 136
6 430
7 1300
8 4435
9 15084
10 53764
11 192700
12 704370
13 2589304
14 9608050
15 35824240
16 134301715
17 505421344
18 1909209550
19 7234153420
20 27489127708
21 104717491064
22 399827748310
23 1529763696820

[4,10,20,55,136,430,1300,4435,15084,53764,192700,
 704370,2589304,9608050,35824240,134301715,
 505421344,1909209550,7234153420,27489127708,
 104717491064,399827748310,1529763696820]

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)