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A299557 as a simple table

n a(n)
1 1
2 18
3 15
4 34
5 77
6 230
7 734
8 2261
9 7050
10 22143
11 69461
12 219276
13 693784
14 2194918
15 6942360
16 21968267
17 69526220
18 220063117
19 696615382
20 2205253721
21 6981275736
22 22101410710
23 69970396941
24 221520928868
25 701324741453
26 2220376409611

[1,18,15,34,77,230,734,2261,7050,22143,69461,
 219276,693784,2194918,6942360,21968267,69526220,
 220063117,696615382,2205253721,6981275736,
 22101410710,69970396941,221520928868,701324741453,
 2220376409611]

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Last modified March 29 10:59 EDT 2024. Contains 371277 sequences. (Running on oeis4.)