n | a(n) |
---|---|
0 | 0 |
1 | 1 |
2 | 2 |
3 | 13 |
4 | 76 |
5 | 789 |
6 | 7734 |
7 | 110937 |
8 | 1528920 |
9 | 28018665 |
10 | 497895210 |
11 | 11110528485 |
12 | 241792844580 |
13 | 6361055257725 |
14 | 163842638377950 |
15 | 4964894559637425 |
16 | 147721447995130800 |
17 | 5066706567801827025 |
18 | 171002070002301095250 |
19 | 6548719685561840296125 |
20 | 247199273204273879989500 |
[0,1,2,13,76,789,7734,110937,1528920,28018665, 497895210,11110528485,241792844580,6361055257725, 163842638377950,4964894559637425, 147721447995130800,5066706567801827025, 171002070002301095250,6548719685561840296125, 247199273204273879989500] |