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A183937 as a simple table

n a(n)
1 1
2 1
3 5
4 15
5 81
6 237
7 1015
8 3891
9 16171
10 66237
11 297003
12 1304467
13 5981617
14 27407859
15 126441771
16 584452845
17 2721978059
18 12719931479
19 59862174023
20 282898499059
21 1341705275365
22 6380905008633
23 30422523202843
24 145340620435425

[1,1,5,15,81,237,1015,3891,16171,66237,297003,
 1304467,5981617,27407859,126441771,584452845,
 2721978059,12719931479,59862174023,282898499059,
 1341705275365,6380905008633,30422523202843,
 145340620435425]

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Last modified September 24 22:46 EDT 2021. Contains 347651 sequences. (Running on oeis4.)