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A114903 as a simple table

n a(n)
0 2
1 4
2 12
3 76
4 572
5 5204
6 59340
7 782996
8 11707324
9 197988340
10 3720933092
11 76811352116
12 1730660689580
13 42251140165108
14 1110607948991028
15 31279537587370916
16 939737174809843644
17 29996522608581396788
18 1013814287146517455812
19 36168456215193554061044

[2,4,12,76,572,5204,59340,782996,11707324,
 197988340,3720933092,76811352116,1730660689580,
 42251140165108,1110607948991028,31279537587370916,
 939737174809843644,29996522608581396788,
 1013814287146517455812,36168456215193554061044]

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Last modified April 9 07:41 EDT 2020. Contains 333344 sequences. (Running on oeis4.)