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A280887 as a simple table

n a(n)
9 1
10 45
11 165
12 8415
13 1287
14 195195
15 366795
16 22046310
17 2358070
18 693870606
19 39982878
20 7765924530
21 19829897010
22 1474459789770
23 4013220090
24 63387586762335
25 769009559175
26 106739428871075
27 85029993637875
28 28720696235896665
29 574973722599705
30 581923529546044725

[1,45,165,8415,1287,195195,366795,22046310,
 2358070,693870606,39982878,7765924530,19829897010,
 1474459789770,4013220090,63387586762335,
 769009559175,106739428871075,85029993637875,
 28720696235896665,574973722599705,
 581923529546044725]

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)