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A005580 as a simple table

n a(n)
2 3
3 8
4 21
5 54
6 141
7 372
8 995
9 2697
10 7397
11 20502
12 57347
13 161658
14 458788
15 1309626
16 3757383
17 10828011
18 31326513
19 90945528

[3,8,21,54,141,372,995,2697,7397,20502,57347,
 161658,458788,1309626,3757383,10828011,31326513,
 90945528]

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)