n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 9 |
4 | 28 |
5 | 109 |
6 | 440 |
7 | 1790 |
8 | 7537 |
9 | 32300 |
10 | 140438 |
11 | 618608 |
12 | 2753510 |
13 | 12366672 |
14 | 55973926 |
15 | 255059808 |
16 | 1169143476 |
17 | 5387268256 |
18 | 24940059514 |
19 | 115943355422 |
20 | 541047868905 |
21 | 2533458659581 |
22 | 11900017205866 |
23 | 56055896316345 |
24 | 264748474342341 |
25 | 1253414056154014 |
26 | 5947373587731308 |
[1,1,2,9,28,109,440,1790,7537,32300,140438,618608, 2753510,12366672,55973926,255059808,1169143476, 5387268256,24940059514,115943355422,541047868905, 2533458659581,11900017205866,56055896316345, 264748474342341,1253414056154014,5947373587731308] |