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A056337 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 15
6 49
7 160
8 498
9 1544
10 4715
11 14356
12 43420
13 131145
14 394990
15 1188564
16 3572400
17 10732065
18 32224216
19 96733636
20 290317660
21 871200664
22 2614083394
23 7843255300
24 23531731530
25 70599259170
26 211805771345

[0,0,1,4,15,49,160,498,1544,4715,14356,43420,
 131145,394990,1188564,3572400,10732065,32224216,
 96733636,290317660,871200664,2614083394,
 7843255300,23531731530,70599259170,211805771345]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)