n | a(n) |
---|---|
1 | 1 |
2 | 23 |
3 | 221 |
4 | 1355 |
5 | 6239 |
6 | 23465 |
7 | 75803 |
8 | 217373 |
9 | 566150 |
10 | 1361802 |
11 | 3063502 |
12 | 6508450 |
13 | 13159666 |
14 | 25481470 |
15 | 47493274 |
16 | 85567222 |
17 | 149553199 |
18 | 254336185 |
19 | 421956275 |
20 | 684451365 |
21 | 1087616985 |
22 | 1695917535 |
23 | 2598828765 |
24 | 3918943275 |
25 | 5822229660 |
26 | 8530902276 |
27 | 12339433068 |
[1,23,221,1355,6239,23465,75803,217373,566150, 1361802,3063502,6508450,13159666,25481470, 47493274,85567222,149553199,254336185,421956275, 684451365,1087616985,1695917535,2598828765, 3918943275,5822229660,8530902276,12339433068] |