n | a(n) |
---|---|
1 | 1 |
2 | 3 |
3 | 6 |
4 | 21 |
5 | 50 |
6 | 108 |
7 | 364 |
8 | 987 |
9 | 1938 |
10 | 6150 |
11 | 17622 |
12 | 34776 |
13 | 121160 |
14 | 306852 |
15 | 549000 |
16 | 2178309 |
17 | 5701290 |
18 | 11197764 |
19 | 39083988 |
20 | 93031050 |
21 | 191708244 |
22 | 697884066 |
23 | 1836283246 |
24 | 3605645232 |
25 | 11442062750 |
26 | 32888033880 |
27 | 64700678454 |
[1,3,6,21,50,108,364,987,1938,6150,17622,34776, 121160,306852,549000,2178309,5701290,11197764, 39083988,93031050,191708244,697884066,1836283246, 3605645232,11442062750,32888033880,64700678454] |