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A097147 as a simple table

n a(n)
1 1
2 3
3 7
4 21
5 66
6 258
7 1079
8 4987
9 25195
10 136723
11 789438
12 4863268
13 31693715
14 217331845
15 1564583770
16 11795630861
17 92833623206
18 760811482322
19 6479991883525
20 57256139503047
21 523919025038279
22 4956976879724565
23 48424420955966635
24 487810283307069696

[1,3,7,21,66,258,1079,4987,25195,136723,789438,
 4863268,31693715,217331845,1564583770,11795630861,
 92833623206,760811482322,6479991883525,
 57256139503047,523919025038279,4956976879724565,
 48424420955966635,487810283307069696]

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Last modified February 26 03:09 EST 2020. Contains 332272 sequences. (Running on oeis4.)