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A200740 as a simple table

n a(n)
0 1
1 1
2 3
3 12
4 54
5 261
6 1324
7 6954
8 37493
9 206316
10 1154050
11 6542485
12 37507919
13 217081155
14 1266646114
15 7443100944
16 44008522719
17 261631301144
18 1562969609155
19 9377744249277
20 56486588669929
21 341452466500382
22 2070684006442310
23 12594325039504367
24 76808163066135791

[1,1,3,12,54,261,1324,6954,37493,206316,1154050,
 6542485,37507919,217081155,1266646114,7443100944,
 44008522719,261631301144,1562969609155,
 9377744249277,56486588669929,341452466500382,
 2070684006442310,12594325039504367,
 76808163066135791]

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Last modified July 30 13:39 EDT 2021. Contains 346359 sequences. (Running on oeis4.)