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A220867 as a simple table

n a(n)
1 2
2 14
3 80
4 194
5 888
6 2702
7 11040
8 37634
9 146024
10 524174
11 1988720
12 7300802
13 27436248
14 101687054
15 380604480
16 1416317954
17 5292200648
18 19726764302
19 73658763920
20 274758382274 

[2,14,80,194,888,2702,11040,37634,146024,524174,
 1988720,7300802,27436248,101687054,380604480,
 1416317954,5292200648,19726764302,73658763920,
 274758382274]

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Last modified June 6 09:48 EDT 2024. Contains 373125 sequences. (Running on oeis4.)