n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 27 |
4 | 257 |
5 | 3156 |
6 | 47442 |
7 | 843352 |
8 | 17300943 |
9 | 402210240 |
10 | 10448526896 |
11 | 299925224064 |
12 | 9426724628301 |
13 | 321959469056512 |
14 | 11872685912032350 |
15 | 470132249600142336 |
16 | 19895288956008203963 |
17 | 896055382220853362688 |
18 | 42793946679993786078108 |
19 | 2160123874888094765056000 |
[1,4,27,257,3156,47442,843352,17300943,402210240, 10448526896,299925224064,9426724628301, 321959469056512,11872685912032350, 470132249600142336,19895288956008203963, 896055382220853362688,42793946679993786078108, 2160123874888094765056000] |