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A197247 as a simple table

n a(n)
1 3
2 40
3 110
4 780
5 5062
6 31276
7 213912
8 1244680
9 8149652
10 54813300
11 363207297
12 2334210952
13 15099425049
14 99496688244
15 657733281792
16 4291822021778
17 27959094118746
18 183056501656614
19 1201021999376817
20 7872982494463940

[3,40,110,780,5062,31276,213912,1244680,8149652,
 54813300,363207297,2334210952,15099425049,
 99496688244,657733281792,4291822021778,
 27959094118746,183056501656614,1201021999376817,
 7872982494463940]

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)