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A028551 as a simple table

n a(n)
0 1
1 0
2 0
3 4646
4 93380
5 1059794
6 8621895
7 56103210
8 310044370
9 1510551680
10 6651075761
11 26933846630
12 101620829275
13 360788432800
14 1214753145335
15 3903008000874
16 12028224670920
17 35705261501310
18 102455800359789
19 285054726362240
20 770966832733441
21 2031593146266830

[1,0,0,4646,93380,1059794,8621895,56103210,
 310044370,1510551680,6651075761,26933846630,
 101620829275,360788432800,1214753145335,
 3903008000874,12028224670920,35705261501310,
 102455800359789,285054726362240,770966832733441,
 2031593146266830]

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Last modified March 28 15:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)