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A037767 as a simple table

n a(n)
1 3
2 18
3 110
4 661
5 3969
6 23814
7 142886
8 857317
9 5143905
10 30863430
11 185180582
12 1111083493
13 6666500961
14 39999005766
15 239994034598
16 1439964207589
17 8639785245537
18 51838711473222
19 311032268839334
20 1866193613036005

[3,18,110,661,3969,23814,142886,857317,5143905,
 30863430,185180582,1111083493,6666500961,
 39999005766,239994034598,1439964207589,
 8639785245537,51838711473222,311032268839334,
 1866193613036005]

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Last modified March 28 14:13 EDT 2024. Contains 371254 sequences. (Running on oeis4.)