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A303892 as a simple table

n a(n)
1 2
2 86
3 271
4 1659
5 7421
6 39711
7 195279
8 1003855
9 5056641
10 25707978
11 130248011
12 660626529
13 3350327180
14 16988500456
15 86159495911
16 436909370593
17 2215734673824
18 11236289992560
19 56982164600014
20 288968180495974
21 1465423301405206

[2,86,271,1659,7421,39711,195279,1003855,5056641,
 25707978,130248011,660626529,3350327180,
 16988500456,86159495911,436909370593,
 2215734673824,11236289992560,56982164600014,
 288968180495974,1465423301405206]

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Last modified September 24 23:43 EDT 2022. Contains 356951 sequences. (Running on oeis4.)