n | a(n) |
---|---|
1 | 1 |
2 | 7 |
3 | 19 |
4 | 151 |
5 | 631 |
6 | 4621 |
7 | 23857 |
8 | 164599 |
9 | 948871 |
10 | 6359617 |
11 | 38944357 |
12 | 258107389 |
13 | 1636264813 |
14 | 10819063087 |
15 | 70033892299 |
16 | 463844386999 |
17 | 3042796871863 |
18 | 20218887555601 |
19 | 133836585431269 |
20 | 892623030133681 |
21 | 5947033694372881 |
[1,7,19,151,631,4621,23857,164599,948871,6359617, 38944357,258107389,1636264813,10819063087, 70033892299,463844386999,3042796871863, 20218887555601,133836585431269,892623030133681, 5947033694372881] |