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A059480 as a simple table

n a(n)
0 1
1 1
2 4
3 8
4 28
5 76
6 272
7 880
8 3328
9 12128
10 48736
11 194272
12 827840
13 3547648
14 15965248
15 72727616
16 344136832
17 1653233920
18 8191833728
19 41256512128
20 213285020416
21 1120928287232
22 6026483756800
23 32928762650368
24 183590856570368

[1,1,4,8,28,76,272,880,3328,12128,48736,194272,
 827840,3547648,15965248,72727616,344136832,
 1653233920,8191833728,41256512128,213285020416,
 1120928287232,6026483756800,32928762650368,
 183590856570368]

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Last modified December 13 22:07 EST 2018. Contains 318087 sequences. (Running on oeis4.)