n | a(n) |
---|---|
1 | 4 |
2 | 28 |
3 | 272 |
4 | 1998 |
5 | 13260 |
6 | 94996 |
7 | 691229 |
8 | 4926082 |
9 | 35082734 |
10 | 251198534 |
11 | 1797886622 |
12 | 12852933731 |
13 | 91912956748 |
14 | 657463618650 |
15 | 4702487810918 |
16 | 33632995941197 |
17 | 240557644773042 |
18 | 1720590474243847 |
19 | 12306454228470804 |
20 | 88021459865552231 |
[4,28,272,1998,13260,94996,691229,4926082, 35082734,251198534,1797886622,12852933731, 91912956748,657463618650,4702487810918, 33632995941197,240557644773042,1720590474243847, 12306454228470804,88021459865552231] |