n | a(n) |
---|---|
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 74 |
6 | 237 |
7 | 668 |
8 | 1667 |
9 | 3750 |
10 | 7743 |
11 | 14898 |
12 | 27033 |
13 | 46698 |
14 | 77369 |
15 | 123672 |
16 | 191639 |
17 | 288998 |
18 | 425499 |
19 | 613278 |
20 | 867261 |
21 | 1205610 |
22 | 1650213 |
23 | 2227220 |
24 | 2967627 |
25 | 3907910 |
26 | 5090711 |
27 | 6565578 |
28 | 8389761 |
29 | 10629066 |
30 | 13358769 |
[1,2,6,21,74,237,668,1667,3750,7743,14898,27033, 46698,77369,123672,191639,288998,425499,613278, 867261,1205610,1650213,2227220,2967627,3907910, 5090711,6565578,8389761,10629066,13358769] |