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A002893 as a simple table

n a(n)
0 1
1 3
2 15
3 93
4 639
5 4653
6 35169
7 272835
8 2157759
9 17319837
10 140668065
11 1153462995
12 9533639025
13 79326566595
14 663835030335
15 5582724468093
16 47152425626559
17 399769750195965
18 3400775573443089
19 29016970072920387
20 248256043372999089 

[1,3,15,93,639,4653,35169,272835,2157759,17319837,
 140668065,1153462995,9533639025,79326566595,
 663835030335,5582724468093,47152425626559,
 399769750195965,3400775573443089,
 29016970072920387,248256043372999089]

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Last modified August 18 23:41 EDT 2024. Contains 375284 sequences. (Running on oeis4.)