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A178520 as a simple table

n a(n)
0 1
1 1
2 1
3 4
4 11
5 32
6 98
7 309
8 998
9 3285
10 10981
11 37178
12 127227
13 439369
14 1529280
15 5359314
16 18894435
17 66967086
18 238473876
19 852825314
20 3061529014
21 11028596473
22 39853923390
23 144435373636
24 524837483375
25 1911763716717
26 6979451843306

[1,1,1,4,11,32,98,309,998,3285,10981,37178,127227,
 439369,1529280,5359314,18894435,66967086,
 238473876,852825314,3061529014,11028596473,
 39853923390,144435373636,524837483375,
 1911763716717,6979451843306]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)