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A222766 as a simple table

n a(n)
1 4
2 18
3 158
4 2608
5 19766
6 333978
7 2645385
8 45830457
9 370518626
10 6504289924
11 53224723750
12 942396671062
13 7774316625479
14 138492173604656
15 1149166452333809
16 20564313304270211
17 171388475477573948
18 3077759439903425070

[4,18,158,2608,19766,333978,2645385,45830457,
 370518626,6504289924,53224723750,942396671062,
 7774316625479,138492173604656,1149166452333809,
 20564313304270211,171388475477573948,
 3077759439903425070]

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Last modified June 24 20:32 EDT 2022. Contains 354830 sequences. (Running on oeis4.)