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A316871 as a simple table

n a(n)
1 4
2 23
3 99
4 425
5 1877
6 8333
7 36900
8 163433
9 724406
10 3210961
11 14232174
12 63085590
13 279639102
14 1239553378
15 5494572826
16 24355881186
17 107962769031
18 478568720832
19 2121361756337
20 9403406620066
21 41682688016275
22 184767777113249

[4,23,99,425,1877,8333,36900,163433,724406,
 3210961,14232174,63085590,279639102,1239553378,
 5494572826,24355881186,107962769031,478568720832,
 2121361756337,9403406620066,41682688016275,
 184767777113249]

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Last modified January 23 03:15 EST 2022. Contains 350504 sequences. (Running on oeis4.)