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A106521 as a simple table

n a(n)
1 18
2 38
3 456
4 854
5 9192
6 17132
7 183474
8 341876
9 3660378
10 6820478
11 73024176
12 136067774
13 1456823232
14 2714535092
15 29063440554
16 54154634156
17 579811987938
18 1080378148118
19 11567176318296
20 21553408328294

[18,38,456,854,9192,17132,183474,341876,3660378,
 6820478,73024176,136067774,1456823232,2714535092,
 29063440554,54154634156,579811987938,
 1080378148118,11567176318296,21553408328294]

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Last modified May 29 20:42 EDT 2020. Contains 334710 sequences. (Running on oeis4.)