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A340726 as a simple table

n a(n)
1 1
2 2
3 6
4 15
5 42
6 143
7 399
8 1190
9 4209
10 13130
11 41591
12 118590
13 404471
14 1158696
15 3893831
16 12222320
17 39428991
18 123471920
19 397952081
20 1297210320 

[1,2,6,15,42,143,399,1190,4209,13130,41591,118590,
 404471,1158696,3893831,12222320,39428991,
 123471920,397952081,1297210320]

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Last modified April 18 11:52 EDT 2024. Contains 371779 sequences. (Running on oeis4.)