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A000298 as a simple table

n a(n)
1 1
2 4
3 12
4 30
5 70
6 159
7 339
8 706
9 1436
10 2853
11 5551
12 10622
13 19975
14 37043
15 67811
16 122561
17 219090
18 387578
19 678977
20 1178769
21 2029115
22 3465056
23 5872648
24 9882301
25 16517284
26 27430358
27 45275673
28 74297072
29 121245153
30 196810381
31 317850809
32 510830685
33 817139589
34 1301251186
35 2063204707
36 3257690903
37 5123047561

[1,4,12,30,70,159,339,706,1436,2853,5551,10622,
 19975,37043,67811,122561,219090,387578,678977,
 1178769,2029115,3465056,5872648,9882301,16517284,
 27430358,45275673,74297072,121245153,196810381,
 317850809,510830685,817139589,1301251186,
 2063204707,3257690903,5123047561]

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Last modified March 5 11:57 EST 2021. Contains 341823 sequences. (Running on oeis4.)