n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 7 |
3 | 15 |
4 | 97 |
5 | 209 |
6 | 1351 |
7 | 2911 |
8 | 18817 |
9 | 40545 |
10 | 262087 |
11 | 564719 |
12 | 3650401 |
13 | 7865521 |
14 | 50843527 |
15 | 109552575 |
16 | 708158977 |
17 | 1525870529 |
18 | 9863382151 |
19 | 21252634831 |
20 | 137379191137 |
21 | 296011017105 |
22 | 1913445293767 |
23 | 4122901604639 |
24 | 26650854921601 |
25 | 57424611447841 |
26 | 371198523608647 |
[1,1,7,15,97,209,1351,2911,18817,40545,262087, 564719,3650401,7865521,50843527,109552575, 708158977,1525870529,9863382151,21252634831, 137379191137,296011017105,1913445293767, 4122901604639,26650854921601,57424611447841, 371198523608647] |