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A002900 as a simple table

n a(n)
1 2
2 6
3 18
4 50
5 142
6 390
7 1086
8 2958
9 8134
10 22050
11 60146
12 162466
13 440750
14 1187222
15 3208298
16 8622666
17 23233338
18 62329366
19 167558310
20 448848582
21 1204403014
22 3222280242
23 8633306906
24 23073198658
25 61740677454
26 164856393110
27 440658745814

[2,6,18,50,142,390,1086,2958,8134,22050,60146,
 162466,440750,1187222,3208298,8622666,23233338,
 62329366,167558310,448848582,1204403014,
 3222280242,8633306906,23073198658,61740677454,
 164856393110,440658745814]

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Last modified April 24 19:56 EDT 2024. Contains 371963 sequences. (Running on oeis4.)