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A075841 as a simple table

n a(n)
1 3
2 15
3 87
4 507
5 2955
6 17223
7 100383
8 585075
9 3410067
10 19875327
11 115841895
12 675176043
13 3935214363
14 22936110135
15 133681446447
16 779152568547
17 4541233964835
18 26468251220463
19 154268273357943
20 899141388927195

[3,15,87,507,2955,17223,100383,585075,3410067,
 19875327,115841895,675176043,3935214363,
 22936110135,133681446447,779152568547,
 4541233964835,26468251220463,154268273357943,
 899141388927195]

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Last modified November 12 09:24 EST 2019. Contains 329052 sequences. (Running on oeis4.)