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A077824 as a simple table

n a(n)
0 1
1 4
2 15
3 56
4 207
5 764
6 2819
7 10400
8 38367
9 141540
10 522155
11 1926280
12 7106231
13 26215564
14 96711715
15 356778736
16 1316190767
17 4855553204
18 17912598619
19 66081283800
20 243780155047
21 899328229980
22 3317707567635
23 12239339472960
24 45152090014111
25 166570364123524

[1,4,15,56,207,764,2819,10400,38367,141540,522155,
 1926280,7106231,26215564,96711715,356778736,
 1316190767,4855553204,17912598619,66081283800,
 243780155047,899328229980,3317707567635,
 12239339472960,45152090014111,166570364123524]

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Last modified May 15 04:08 EDT 2024. Contains 372536 sequences. (Running on oeis4.)