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A027783 as a simple table

n a(n)
8 45
9 550
10 3630
11 17160
12 65065
13 210210
14 600600
15 1555840
16 3719430
17 8314020
18 17551820
19 35271600
20 67897830
21 125847260
22 225544440
23 392251200
24 663966875
25 1096717050
26 1771619850
27 2804201400
28 4356527175
29 6652824750
30 9999397200
31 14809766400
32 21636143100
33 31208497320

[45,550,3630,17160,65065,210210,600600,1555840,
 3719430,8314020,17551820,35271600,67897830,
 125847260,225544440,392251200,663966875,
 1096717050,1771619850,2804201400,4356527175,
 6652824750,9999397200,14809766400,21636143100,
 31208497320]

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Last modified June 15 08:52 EDT 2021. Contains 345048 sequences. (Running on oeis4.)