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A297621 as a simple table

n a(n)
0 1
1 3
2 15
3 39
4 279
5 759
6 1719
7 3639
8 13623
9 33591
10 73527
11 153399
12 313143
13 632631
14 1271607
15 2549559
16 20834103
17 57403191
18 130541367
19 276817719
20 569370423
21 1154475831
22 2324686647
23 4665108279
24 9345951543
25 18707638071
26 37431011127
27 74877757239
28 149771249463

[1,3,15,39,279,759,1719,3639,13623,33591,73527,
 153399,313143,632631,1271607,2549559,20834103,
 57403191,130541367,276817719,569370423,1154475831,
 2324686647,4665108279,9345951543,18707638071,
 37431011127,74877757239,149771249463]

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Last modified November 29 18:41 EST 2021. Contains 349416 sequences. (Running on oeis4.)