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A027971 as a simple table

n a(n)
5 3
6 7
7 18
8 47
9 123
10 319
11 806
12 1954
13 4506
14 9859
15 20495
16 40615
17 77040
18 140455
19 247085
20 420906
21 696509
22 1122751
23 1767344
24 2722551
25 4112177
26 6100063
27 8900312
28 12789498
29 18121132
30 25342683
31 35015477
32 47837823
33 64671742

[3,7,18,47,123,319,806,1954,4506,9859,20495,40615,
 77040,140455,247085,420906,696509,1122751,1767344,
 2722551,4112177,6100063,8900312,12789498,18121132,
 25342683,35015477,47837823,64671742]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)