n | a(n) |
---|---|
1 | 4 |
2 | 9 |
3 | 21 |
4 | 49 |
5 | 65 |
6 | 86 |
7 | 265 |
8 | 1081 |
9 | 1897 |
10 | 2513 |
11 | 7739 |
12 | 97229 |
13 | 128801 |
14 | 299426 |
15 | 922111 |
16 | 1221537 |
17 | 2839729 |
18 | 62608681 |
19 | 338356945 |
20 | 53406819691 |
21 | 2066337330754 |
22 | 6363483400447 |
23 | 8429820731201 |
24 | 432062194544201 |
25 | 7190854504969591 |
26 | 12619069972000553 |
27 | 16716708595637087 |
[4,9,21,49,65,86,265,1081,1897,2513,7739,97229, 128801,299426,922111,1221537,2839729,62608681, 338356945,53406819691,2066337330754,6363483400447, 8429820731201,432062194544201,7190854504969591, 12619069972000553,16716708595637087] |