n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 5 |
3 | 15 |
4 | 50 |
5 | 164 |
6 | 572 |
7 | 2007 |
8 | 7147 |
9 | 25744 |
10 | 94470 |
11 | 345562 |
12 | 1283521 |
13 | 4774425 |
14 | 17870925 |
15 | 67071406 |
16 | 253596740 |
17 | 957841394 |
18 | 3641689270 |
19 | 13852713872 |
20 | 52882413683 |
21 | 202064486221 |
22 | 775138650253 |
23 | 2972225528641 |
24 | 11437906305874 |
25 | 44025442187961 |
26 | 169850215967115 |
27 | 655535281281558 |
28 | 2536205112396006 |
[1,2,5,15,50,164,572,2007,7147,25744,94470,345562, 1283521,4774425,17870925,67071406,253596740, 957841394,3641689270,13852713872,52882413683, 202064486221,775138650253,2972225528641, 11437906305874,44025442187961,169850215967115, 655535281281558,2536205112396006] |