n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 12 |
3 | 34 |
4 | 98 |
5 | 294 |
6 | 919 |
7 | 2974 |
8 | 9891 |
9 | 33604 |
10 | 116103 |
11 | 406614 |
12 | 1440025 |
13 | 5147876 |
14 | 18550572 |
15 | 67310938 |
16 | 245716094 |
17 | 901759950 |
18 | 3325066996 |
19 | 12312494462 |
20 | 45766188948 |
21 | 170702447074 |
22 | 638698318850 |
23 | 2396598337950 |
[1,4,12,34,98,294,919,2974,9891,33604,116103, 406614,1440025,5147876,18550572,67310938, 245716094,901759950,3325066996,12312494462, 45766188948,170702447074,638698318850, 2396598337950] |