n | a(n) |
---|---|
1 | 1 |
2 | 4 |
3 | 12 |
4 | 37 |
5 | 118 |
6 | 387 |
7 | 1298 |
8 | 4433 |
9 | 15366 |
10 | 53924 |
11 | 191216 |
12 | 684114 |
13 | 2466428 |
14 | 8951945 |
15 | 32683230 |
16 | 119949945 |
17 | 442281030 |
18 | 1637618400 |
19 | 6086481720 |
20 | 22699003830 |
21 | 84918443220 |
22 | 318593346630 |
23 | 1198421583684 |
24 | 4518886787802 |
25 | 17077448924828 |
26 | 64671604514552 |
27 | 245380598678208 |
28 | 932708665735364 |
29 | 3551238550341944 |
30 | 13542393822575541 |
[1,4,12,37,118,387,1298,4433,15366,53924,191216, 684114,2466428,8951945,32683230,119949945, 442281030,1637618400,6086481720,22699003830, 84918443220,318593346630,1198421583684, 4518886787802,17077448924828,64671604514552, 245380598678208,932708665735364,3551238550341944, 13542393822575541] |