n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 17 |
3 | 78 |
4 | 393 |
5 | 2208 |
6 | 13977 |
7 | 100026 |
8 | 806769 |
9 | 7280604 |
10 | 72865089 |
11 | 801693126 |
12 | 9620848953 |
13 | 125072630712 |
14 | 1751021612937 |
15 | 26265338542962 |
16 | 420245459734113 |
17 | 7144172944620084 |
18 | 128595113390582001 |
19 | 2443307155583319486 |
20 | 48866143115153174121 |
[1,4,17,78,393,2208,13977,100026,806769,7280604, 72865089,801693126,9620848953,125072630712, 1751021612937,26265338542962,420245459734113, 7144172944620084,128595113390582001, 2443307155583319486,48866143115153174121] |