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A253449 as a simple table

n a(n)
1 81
2 414
3 1388
4 3639
5 8501
6 19701
7 48293
8 126357
9 346997
10 982677
11 2837237
12 8295957
13 24462197
14 72541077
15 215938037
16 644449557
17 1926625397
18 5766435477
19 17272430837
20 51763547157
21 155183156597
22 465334505877
23 1395573595637
24 4185860948757

[81,414,1388,3639,8501,19701,48293,126357,346997,
 982677,2837237,8295957,24462197,72541077,
 215938037,644449557,1926625397,5766435477,
 17272430837,51763547157,155183156597,465334505877,
 1395573595637,4185860948757]

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Last modified September 21 13:55 EDT 2021. Contains 347598 sequences. (Running on oeis4.)