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A300048 as a simple table

n a(n)
0 1
1 1
2 2
3 7
4 29
5 131
6 627
7 3124
8 16032
9 84162
10 449828
11 2439550
12 13391105
13 74256824
14 415357737
15 2340775363
16 13278009018
17 75753246286
18 434392031856
19 2502289328542
20 14473290097526
21 84023214062635
22 489424396591995
23 2859551104564120
24 16754209625090980
25 98415932763515679
26 579475837597933632
27 3419452319373566239
28 20219028961691299994

[1,1,2,7,29,131,627,3124,16032,84162,449828,
 2439550,13391105,74256824,415357737,2340775363,
 13278009018,75753246286,434392031856,
 2502289328542,14473290097526,84023214062635,
 489424396591995,2859551104564120,
 16754209625090980,98415932763515679,
 579475837597933632,3419452319373566239,
 20219028961691299994]

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Last modified February 28 09:24 EST 2021. Contains 341695 sequences. (Running on oeis4.)