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A197674 as a simple table

n a(n)
1 4
2 16
3 57
4 202
5 721
6 2557
7 8930
8 31326
9 110217
10 387627
11 1363559
12 4796483
13 16870356
14 59337438
15 208705786
16 734075168
17 2581952574
18 9081465807
19 31942103268
20 112349483389
21 395165129695
22 1389908311471
23 4888703531124
24 17194963235219

[4,16,57,202,721,2557,8930,31326,110217,387627,
 1363559,4796483,16870356,59337438,208705786,
 734075168,2581952574,9081465807,31942103268,
 112349483389,395165129695,1389908311471,
 4888703531124,17194963235219]

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Last modified May 24 21:08 EDT 2022. Contains 354043 sequences. (Running on oeis4.)