n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 31 |
4 | 264 |
5 | 1856 |
6 | 12703 |
7 | 71457 |
8 | 348622 |
9 | 1477513 |
10 | 5584477 |
11 | 19071063 |
12 | 59748789 |
13 | 173510124 |
14 | 471615249 |
15 | 1208756261 |
16 | 2940705168 |
17 | 6827326093 |
18 | 15197942364 |
19 | 32566376769 |
20 | 67408927586 |
21 | 135184087822 |
22 | 263356043520 |
23 | 499542801451 |
24 | 924501767285 |
25 | 1672391804486 |
[1,1,7,31,264,1856,12703,71457,348622,1477513, 5584477,19071063,59748789,173510124,471615249, 1208756261,2940705168,6827326093,15197942364, 32566376769,67408927586,135184087822,263356043520, 499542801451,924501767285,1672391804486] |