n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 6 |
4 | 25 |
5 | 69 |
6 | 306 |
7 | 968 |
8 | 4495 |
9 | 15457 |
10 | 73187 |
11 | 265886 |
12 | 1276200 |
13 | 4822808 |
14 | 23356328 |
15 | 90916036 |
16 | 443070045 |
17 | 1764876843 |
18 | 8640616651 |
19 | 35059209106 |
20 | 172241437579 |
21 | 709515169465 |
22 | 3495119780527 |
23 | 14580289703320 |
24 | 71975955298661 |
25 | 303483724749584 |
26 | 1500714793344535 |
27 | 6386054657765297 |
28 | 31622910371957637 |
[1,1,3,6,25,69,306,968,4495,15457,73187,265886, 1276200,4822808,23356328,90916036,443070045, 1764876843,8640616651,35059209106,172241437579, 709515169465,3495119780527,14580289703320, 71975955298661,303483724749584,1500714793344535, 6386054657765297,31622910371957637] |