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A026902 as a simple table

n a(n)
1 1
2 1
3 4
4 5
5 18
6 24
7 84
8 115
9 400
10 554
11 1934
12 2690
13 9474
14 13180
15 46962
16 65193
17 235338
18 325568
19 1191292
20 1641192
21 6086880
22 8348342
23 31369180
24 42831204
25 162943236
26 221515918
27 852512496
28 1154208486
29 4489722568
30 6055426942

[1,1,4,5,18,24,84,115,400,554,1934,2690,9474,
 13180,46962,65193,235338,325568,1191292,1641192,
 6086880,8348342,31369180,42831204,162943236,
 221515918,852512496,1154208486,4489722568,
 6055426942]

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Last modified April 23 10:13 EDT 2024. Contains 371905 sequences. (Running on oeis4.)