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A297945 as a simple table

n a(n)
1 1
2 4
3 18
4 52
5 174
6 604
7 2048
8 6948
9 23652
10 80488
11 273840
12 931808
13 3170824
14 10789824
15 36716272
16 124940880
17 425158448
18 1446762336
19 4923157280
20 16752910976
21 57008139808
22 193991844032
23 660130925440
24 2246346198336
25 7644046147776

[1,4,18,52,174,604,2048,6948,23652,80488,273840,
 931808,3170824,10789824,36716272,124940880,
 425158448,1446762336,4923157280,16752910976,
 57008139808,193991844032,660130925440,
 2246346198336,7644046147776]

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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)