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A213292 as a simple table

n a(n)
0 1
1 4
2 16
3 46
4 118
5 276
6 712
7 1805
8 4895
9 13280
10 37993
11 109386
12 328219
13 992413
14 3101399
15 9764376
16 31580645
17 102797899
18 342075208
19 1144125506
20 3896297053
21 13319243655
22 46206520968
23 160729837020
24 565901313043
25 1996113320841
26 7111795754941
27 25369213794266

[1,4,16,46,118,276,712,1805,4895,13280,37993,
 109386,328219,992413,3101399,9764376,31580645,
 102797899,342075208,1144125506,3896297053,
 13319243655,46206520968,160729837020,565901313043,
 1996113320841,7111795754941,25369213794266]

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Last modified July 3 17:50 EDT 2022. Contains 355055 sequences. (Running on oeis4.)