n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 27 |
3 | 226 |
4 | 2116 |
5 | 21218 |
6 | 222851 |
7 | 2420134 |
8 | 26954622 |
9 | 306203536 |
10 | 3534170486 |
11 | 41326973520 |
12 | 488562349730 |
13 | 5829471835390 |
14 | 70112478797987 |
15 | 849110215237094 |
16 | 10345827793291654 |
17 | 126734013316914248 |
18 | 1559884942820510474 |
19 | 19281814963272771308 |
20 | 239263099541276559360 |
21 | 2979328903819471935332 |
[1,4,27,226,2116,21218,222851,2420134,26954622, 306203536,3534170486,41326973520,488562349730, 5829471835390,70112478797987,849110215237094, 10345827793291654,126734013316914248, 1559884942820510474,19281814963272771308, 239263099541276559360,2979328903819471935332] |