n | a(n) |
---|---|
0 | 1 |
1 | 31 |
2 | 186 |
3 | 1581 |
4 | 7316 |
5 | 30039 |
6 | 103974 |
7 | 330429 |
8 | 947050 |
9 | 2533289 |
10 | 6325550 |
11 | 14969435 |
12 | 33665380 |
13 | 72544185 |
14 | 150236850 |
15 | 300540195 |
16 | 582235491 |
17 | 1096087770 |
18 | 2009383420 |
19 | 3595937070 |
20 | 6292703640 |
21 | 10787811210 |
22 | 18142828740 |
23 | 29975617710 |
[1,31,186,1581,7316,30039,103974,330429,947050, 2533289,6325550,14969435,33665380,72544185, 150236850,300540195,582235491,1096087770, 2009383420,3595937070,6292703640,10787811210, 18142828740,29975617710] |