n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 9 |
4 | 76 |
5 | 161 |
6 | 559 |
7 | 720 |
8 | 25039 |
9 | 25759 |
10 | 102316 |
11 | 230391 |
12 | 1945444 |
13 | 4121279 |
14 | 14309281 |
15 | 18430560 |
16 | 640948321 |
17 | 659378881 |
18 | 2619084964 |
19 | 5897548809 |
20 | 49799475436 |
21 | 105496499681 |
22 | 366288974479 |
23 | 471785474160 |
24 | 16406995095919 |
25 | 16878780570079 |
26 | 67043336806156 |
[1,1,4,9,76,161,559,720,25039,25759,102316,230391, 1945444,4121279,14309281,18430560,640948321, 659378881,2619084964,5897548809,49799475436, 105496499681,366288974479,471785474160, 16406995095919,16878780570079,67043336806156] |