n | a(n) |
---|---|
0 | 1 |
1 | 2 |
2 | 9 |
3 | 55 |
4 | 465 |
5 | 5051 |
6 | 69265 |
7 | 1147287 |
8 | 22307905 |
9 | 497211049 |
10 | 12484203601 |
11 | 348391613615 |
12 | 10691846920081 |
13 | 357749800027465 |
14 | 12958472141161457 |
15 | 505088781523073326 |
16 | 21076091000708067585 |
17 | 937322034938743608556 |
18 | 44256147057318887809993 |
19 | 2210813717869831566759857 |
20 | 116492226446226314836976401 |
[1,2,9,55,465,5051,69265,1147287,22307905, 497211049,12484203601,348391613615,10691846920081, 357749800027465,12958472141161457, 505088781523073326,21076091000708067585, 937322034938743608556,44256147057318887809993, 2210813717869831566759857, 116492226446226314836976401] |