n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 6 |
3 | 25 |
4 | 78 |
5 | 258 |
6 | 800 |
7 | 2463 |
8 | 7344 |
9 | 21511 |
10 | 61677 |
11 | 173980 |
12 | 483319 |
13 | 1323470 |
14 | 3577605 |
15 | 9553658 |
16 | 25227727 |
17 | 65918419 |
18 | 170552866 |
19 | 437196640 |
20 | 1110945961 |
21 | 2799689792 |
22 | 7000246591 |
23 | 17372882671 |
24 | 42809388080 |
25 | 104774554942 |
26 | 254771953179 |
27 | 615667051237 |
28 | 1478934870484 |
29 | 3532347875968 |
[1,1,6,25,78,258,800,2463,7344,21511,61677,173980, 483319,1323470,3577605,9553658,25227727,65918419, 170552866,437196640,1110945961,2799689792, 7000246591,17372882671,42809388080,104774554942, 254771953179,615667051237,1478934870484, 3532347875968] |