n | a(n) |
---|---|
1 | 2 |
2 | 5 |
3 | 11 |
4 | 26 |
5 | 56 |
6 | 122 |
7 | 287 |
8 | 677 |
9 | 1457 |
10 | 3137 |
11 | 6833 |
12 | 14885 |
13 | 35015 |
14 | 82370 |
15 | 194300 |
16 | 458330 |
17 | 986390 |
18 | 2122850 |
19 | 4570610 |
20 | 9840770 |
21 | 21435122 |
22 | 46689890 |
23 | 101709206 |
24 | 221563226 |
25 | 521198276 |
26 | 1226050226 |
27 | 2884185551 |
28 | 6784816901 |
29 | 16004491001 |
30 | 37752490001 |
31 | 89053519001 |
[2,5,11,26,56,122,287,677,1457,3137,6833,14885, 35015,82370,194300,458330,986390,2122850,4570610, 9840770,21435122,46689890,101709206,221563226, 521198276,1226050226,2884185551,6784816901, 16004491001,37752490001,89053519001] |