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A026660 as a simple table

n a(n)
0 1
1 2
2 8
3 26
4 118
5 410
6 1946
7 6958
8 33764
9 122638
10 602972
11 2211946
12 10970256
13 40518606
14 202195920
15 750531666
16 3762558534
17 14019202506
18 70531575722
19 263582194126
20 1329868264538
21 4981772359258
22 25193088990806
23 94561764282118

[1,2,8,26,118,410,1946,6958,33764,122638,602972,
 2211946,10970256,40518606,202195920,750531666,
 3762558534,14019202506,70531575722,263582194126,
 1329868264538,4981772359258,25193088990806,
 94561764282118]

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Last modified March 29 06:34 EDT 2024. Contains 371265 sequences. (Running on oeis4.)