n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 6 |
3 | 20 |
4 | 70 |
5 | 260 |
6 | 986 |
7 | 3852 |
8 | 15284 |
9 | 61646 |
10 | 251636 |
11 | 1038026 |
12 | 4320900 |
13 | 18123780 |
14 | 76544604 |
15 | 325197844 |
16 | 1389044326 |
17 | 5961411840 |
18 | 25695687106 |
19 | 111190743966 |
20 | 482866090476 |
21 | 2103799954064 |
22 | 9193627059292 |
23 | 40287920890732 |
24 | 177002193428102 |
25 | 779506763324538 |
26 | 3440547333117048 |
27 | 15217327587907986 |
[1,2,6,20,70,260,986,3852,15284,61646,251636, 1038026,4320900,18123780,76544604,325197844, 1389044326,5961411840,25695687106,111190743966, 482866090476,2103799954064,9193627059292, 40287920890732,177002193428102,779506763324538, 3440547333117048,15217327587907986] |