n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 1 |
3 | 2 |
4 | 6 |
5 | 21 |
6 | 112 |
7 | 697 |
8 | 6386 |
9 | 75700 |
10 | 1156842 |
11 | 21503340 |
12 | 471142472 |
13 | 11851753163 |
14 | 336605142326 |
15 | 10661879669294 |
16 | 373171677147769 |
17 | 14326039970010402 |
18 | 599529134063451455 |
19 | 27206654007549974712 |
20 | 1332697569146848014994 |
21 | 70181910345392508318643 |
22 | 3959059626001669328959513 |
[1,1,1,2,6,21,112,697,6386,75700,1156842,21503340, 471142472,11851753163,336605142326,10661879669294, 373171677147769,14326039970010402, 599529134063451455,27206654007549974712, 1332697569146848014994,70181910345392508318643, 3959059626001669328959513] |