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A277653 as a simple table

n a(n)
1 0
2 0
3 1
4 2
5 8
6 28
7 98
8 346
9 1218
10 4290
11 15110
12 53218
13 187438
14 660170
15 2325166
16 8189402
17 28843662
18 101589450
19 357805342
20 1260216122
21 4438571726
22 15632968522
23 55060438334
24 193926819802
25 683024192622
26 2405660280426
27 8472908349854

[0,0,1,2,8,28,98,346,1218,4290,15110,53218,187438,
 660170,2325166,8189402,28843662,101589450,
 357805342,1260216122,4438571726,15632968522,
 55060438334,193926819802,683024192622,
 2405660280426,8472908349854]

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Last modified April 16 08:27 EDT 2024. Contains 371698 sequences. (Running on oeis4.)