n | a(n) |
---|---|
9 | 220 |
10 | 4004 |
11 | 43680 |
12 | 371280 |
13 | 2713200 |
14 | 17907120 |
15 | 109830336 |
16 | 637408200 |
17 | 3543239700 |
18 | 19028509500 |
19 | 99348849600 |
20 | 506679132960 |
21 | 2533395664800 |
22 | 12454385680800 |
23 | 60338017584000 |
24 | 288616850776800 |
25 | 1365157704174264 |
26 | 6393385628146440 |
27 | 29677938224482240 |
28 | 136674715507484000 |
[220,4004,43680,371280,2713200,17907120,109830336, 637408200,3543239700,19028509500,99348849600, 506679132960,2533395664800,12454385680800, 60338017584000,288616850776800,1365157704174264, 6393385628146440,29677938224482240, 136674715507484000] |