n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 3 |
3 | 8 |
4 | 21 |
5 | 54 |
6 | 140 |
7 | 363 |
8 | 941 |
9 | 2439 |
10 | 6322 |
11 | 16387 |
12 | 42476 |
13 | 110100 |
14 | 285385 |
15 | 739733 |
16 | 1917427 |
17 | 4970072 |
18 | 12882689 |
19 | 33392610 |
20 | 86555408 |
21 | 224356187 |
22 | 581543081 |
23 | 1507390367 |
24 | 3907235410 |
25 | 10127760455 |
26 | 26251689768 |
27 | 68045765768 |
28 | 176378217169 |
29 | 457181650329 |
30 | 1185038973363 |
[1,1,3,8,21,54,140,363,941,2439,6322,16387,42476, 110100,285385,739733,1917427,4970072,12882689, 33392610,86555408,224356187,581543081,1507390367, 3907235410,10127760455,26251689768,68045765768, 176378217169,457181650329,1185038973363] |