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A303890 as a simple table

n a(n)
1 1
2 7
3 23
4 86
5 313
6 1145
7 4184
8 15293
9 55895
10 204294
11 746685
12 2729101
13 9974744
14 36457249
15 133249635
16 487021534
17 1780042209
18 6505975697
19 23779053976
20 86911392597
21 317657303391
22 1161023421462
23 4243489354069
24 15509766267621

[1,7,23,86,313,1145,4184,15293,55895,204294,
 746685,2729101,9974744,36457249,133249635,
 487021534,1780042209,6505975697,23779053976,
 86911392597,317657303391,1161023421462,
 4243489354069,15509766267621]

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Last modified October 3 04:46 EDT 2022. Contains 357230 sequences. (Running on oeis4.)