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A007178 as a simple table

n a(n)
1 1
2 1
3 3
4 13
5 75
6 525
7 4347
8 41245
9 441675
10 5259885
11 68958747
12 986533053
13 15292855019
14 255321427725
15 4567457001915
16 87156877087069
17 1767115200924299
18 37936303950503853
19 859663073472084315
20 20505904049009202685
21 513593410566661282347
22 13476082013068430626893

[1,1,3,13,75,525,4347,41245,441675,5259885,
 68958747,986533053,15292855019,255321427725,
 4567457001915,87156877087069,1767115200924299,
 37936303950503853,859663073472084315,
 20505904049009202685,513593410566661282347,
 13476082013068430626893]

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)