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A037655 as a simple table

n a(n)
1 3
2 18
3 110
4 663
5 3978
6 23870
7 143223
8 859338
9 5156030
10 30936183
11 185617098
12 1113702590
13 6682215543
14 40093293258
15 240559759550
16 1443358557303
17 8660151343818
18 51960908062910
19 311765448377463
20 1870592690264778

[3,18,110,663,3978,23870,143223,859338,5156030,
 30936183,185617098,1113702590,6682215543,
 40093293258,240559759550,1443358557303,
 8660151343818,51960908062910,311765448377463,
 1870592690264778]

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Last modified March 29 00:26 EDT 2024. Contains 371264 sequences. (Running on oeis4.)