n | a(n) |
---|---|
1 | 4 |
2 | 31 |
3 | 139 |
4 | 1411 |
5 | 9430 |
6 | 63154 |
7 | 452515 |
8 | 3130768 |
9 | 21630714 |
10 | 150540232 |
11 | 1043064746 |
12 | 7226190511 |
13 | 50094800811 |
14 | 347052655839 |
15 | 2404198149909 |
16 | 16655726484462 |
17 | 115373519626103 |
18 | 799165840938429 |
19 | 5535587924914620 |
20 | 38342402997836989 |
[4,31,139,1411,9430,63154,452515,3130768,21630714, 150540232,1043064746,7226190511,50094800811, 347052655839,2404198149909,16655726484462, 115373519626103,799165840938429,5535587924914620, 38342402997836989] |