n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 224 |
5 | 2601 |
6 | 37072 |
7 | 626137 |
8 | 12227280 |
9 | 271086625 |
10 | 6727858496 |
11 | 184818121929 |
12 | 5568152828416 |
13 | 182575550335465 |
14 | 6473161538599680 |
15 | 246781048203043561 |
16 | 10067677495565927168 |
17 | 437653901985319521153 |
18 | 20197310874805488471040 |
19 | 986221173076368356013625 |
[1,1,4,25,224,2601,37072,626137,12227280, 271086625,6727858496,184818121929,5568152828416, 182575550335465,6473161538599680, 246781048203043561,10067677495565927168, 437653901985319521153,20197310874805488471040, 986221173076368356013625] |