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A005961 as a simple table

n a(n)
1 1
2 2
3 5
4 13
5 37
6 108
7 325
8 993
9 3070
10 9564
11 29979
12 94392
13 298311
14 945592
15 3005021
16 9570559
17 30539044
18 97611676
19 312462096
20 1001554565
21 3214232129
22 10326580526
23 33210135104
24 106901289420
25 344398593149
26 1110395171502
27 3582666470285
28 11567123373968

[1,2,5,13,37,108,325,993,3070,9564,29979,94392,
 298311,945592,3005021,9570559,30539044,97611676,
 312462096,1001554565,3214232129,10326580526,
 33210135104,106901289420,344398593149,
 1110395171502,3582666470285,11567123373968]

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Last modified January 25 01:39 EST 2020. Contains 331229 sequences. (Running on oeis4.)