n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 25 |
4 | 162 |
5 | 1160 |
6 | 8731 |
7 | 68364 |
8 | 550707 |
9 | 4535402 |
10 | 38012170 |
11 | 323168946 |
12 | 2780229079 |
13 | 24158457026 |
14 | 211721412339 |
15 | 1869239684558 |
16 | 16609750957942 |
17 | 148431230687412 |
18 | 1333134683364035 |
19 | 12027524448579488 |
20 | 108951760865234373 |
21 | 990555733683233240 |
22 | 9035754580314840475 |
[1,1,4,25,162,1160,8731,68364,550707,4535402, 38012170,323168946,2780229079,24158457026, 211721412339,1869239684558,16609750957942, 148431230687412,1333134683364035, 12027524448579488,108951760865234373, 990555733683233240,9035754580314840475] |