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A253987 as a simple table

n a(n)
1 2736
2 13188
3 71116
4 406183
5 2136758
6 11055001
7 57285940
8 292920515
9 1484002479
10 7476194054
11 37444501224
12 186551627339
13 925459276687
14 4573566632656
15 22524344983871
16 110592854608614
17 541521269124949
18 2645012332922518 

[2736,13188,71116,406183,2136758,11055001,
 57285940,292920515,1484002479,7476194054,
 37444501224,186551627339,925459276687,
 4573566632656,22524344983871,110592854608614,
 541521269124949,2645012332922518]

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Last modified December 5 10:28 EST 2023. Contains 367589 sequences. (Running on oeis4.)