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A267928 as a simple table

n a(n)
1 4
2 16
3 60
4 222
5 804
6 2872
7 10132
8 35383
9 122480
10 420752
11 1435736
12 4870132
13 16432216
14 55178416
15 184481816
16 614348813
17 2038435340
18 6740997616
19 22223182372
20 73053304378
21 239502956924
22 783241953896
23 2555428926860
24 8319101465587

[4,16,60,222,804,2872,10132,35383,122480,420752,
 1435736,4870132,16432216,55178416,184481816,
 614348813,2038435340,6740997616,22223182372,
 73053304378,239502956924,783241953896,
 2555428926860,8319101465587]

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Last modified June 13 00:51 EDT 2024. Contains 373362 sequences. (Running on oeis4.)