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A028556 as a simple table

n a(n)
1 0
2 5
3 77
4 252
5 525
6 1221
7 2112
8 21312
9 56165
10 73437
11 276672
12 1265621
13 2114112
14 2509052
15 29311392
16 69555596
17 71588517
18 122434221
19 126000621
20 540888045
21 5401221045
22 21183638112
23 69069096096
24 71149694117
25 79158385197
26 2752360632572
27 7320655560237
28 12278611687221

[0,5,77,252,525,1221,2112,21312,56165,73437,
 276672,1265621,2114112,2509052,29311392,69555596,
 71588517,122434221,126000621,540888045,5401221045,
 21183638112,69069096096,71149694117,79158385197,
 2752360632572,7320655560237,12278611687221]

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Last modified July 24 08:15 EDT 2024. Contains 374575 sequences. (Running on oeis4.)