n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 14 |
4 | 48 |
5 | 165 |
6 | 572 |
7 | 2001 |
8 | 7056 |
9 | 25042 |
10 | 89320 |
11 | 319793 |
12 | 1148184 |
13 | 4131009 |
14 | 14885468 |
15 | 53697270 |
16 | 193862592 |
17 | 700312381 |
18 | 2530902676 |
19 | 9149426897 |
20 | 33083393640 |
21 | 119645675898 |
22 | 432748165304 |
23 | 1565346866889 |
24 | 5662560013488 |
25 | 20484930829825 |
26 | 74108882866612 |
27 | 268111981441886 |
[1,4,14,48,165,572,2001,7056,25042,89320,319793, 1148184,4131009,14885468,53697270,193862592, 700312381,2530902676,9149426897,33083393640, 119645675898,432748165304,1565346866889, 5662560013488,20484930829825,74108882866612, 268111981441886] |