n | a(n) |
---|---|
1 | 1 |
2 | 9 |
3 | 28 |
4 | 73 |
5 | 251 |
6 | 954 |
7 | 3431 |
8 | 12617 |
9 | 48142 |
10 | 184509 |
11 | 710755 |
12 | 2768410 |
13 | 10857575 |
14 | 42779655 |
15 | 169411778 |
16 | 673898825 |
17 | 2690398105 |
18 | 10776264120 |
19 | 43294049155 |
20 | 174399508573 |
21 | 704214759836 |
22 | 2849828137869 |
23 | 11555835845903 |
24 | 46943852758298 |
[1,9,28,73,251,954,3431,12617,48142,184509,710755, 2768410,10857575,42779655,169411778,673898825, 2690398105,10776264120,43294049155,174399508573, 704214759836,2849828137869,11555835845903, 46943852758298] |