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A063881 as a simple table

n a(n)
2 1
3 4
4 18
5 80
6 367
7 1708
8 8122
9 39204
10 191963
11 950984
12 4759626
13 24030736
14 122258314
15 626162464
16 3225926450
17 16706775984
18 86928097451
19 454203897192
20 2382255252398
21 12537764465072
22 66193294753768
23 350472816969976
24 1860542261745782
25 9901018433270812

[1,4,18,80,367,1708,8122,39204,191963,950984,
 4759626,24030736,122258314,626162464,3225926450,
 16706775984,86928097451,454203897192,
 2382255252398,12537764465072,66193294753768,
 350472816969976,1860542261745782,9901018433270812]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)