n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 4 |
3 | 12 |
4 | 46 |
5 | 160 |
6 | 643 |
7 | 2575 |
8 | 10729 |
9 | 44624 |
10 | 190291 |
11 | 823169 |
12 | 3608545 |
13 | 15902256 |
14 | 70658022 |
15 | 316491884 |
16 | 1428784897 |
17 | 6481876262 |
18 | 29534326134 |
19 | 135186987516 |
20 | 621730458462 |
21 | 2870676877668 |
22 | 13296405107770 |
23 | 61766333479830 |
24 | 287795260731617 |
25 | 1344834924402010 |
26 | 6300001869005030 |
27 | 29577249454624618 |
[1,1,4,12,46,160,643,2575,10729,44624,190291, 823169,3608545,15902256,70658022,316491884, 1428784897,6481876262,29534326134,135186987516, 621730458462,2870676877668,13296405107770, 61766333479830,287795260731617,1344834924402010, 6300001869005030,29577249454624618] |