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A234817 as a simple table

n a(n)
1 686
2 2220
3 6282
4 22098
5 68570
6 252486
7 828354
8 3136350
9 10660586
10 41107950
11 143165922
12 559043598
13 1982378090
14 7810154766
15 28090231074
16 111378700110
17 405255972266
18 1614238905870
19 5930740315362
20 23700937672398
21 87799125560810

[686,2220,6282,22098,68570,252486,828354,3136350,
 10660586,41107950,143165922,559043598,1982378090,
 7810154766,28090231074,111378700110,405255972266,
 1614238905870,5930740315362,23700937672398,
 87799125560810]

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)