n | a(n) |
---|---|
1 | 4 |
2 | 9 |
3 | 25 |
4 | 56 |
5 | 143 |
6 | 273 |
7 | 578 |
8 | 1045 |
9 | 2047 |
10 | 4176 |
11 | 7223 |
12 | 13949 |
13 | 25010 |
14 | 42441 |
15 | 75059 |
16 | 136952 |
17 | 246679 |
18 | 412665 |
19 | 733382 |
20 | 1257481 |
21 | 2091961 |
22 | 3663072 |
23 | 6227075 |
24 | 10803977 |
25 | 19052546 |
26 | 32098911 |
27 | 52965587 |
28 | 89028280 |
29 | 146743321 |
30 | 246148917 |
31 | 447621406 |
[4,9,25,56,143,273,578,1045,2047,4176,7223,13949, 25010,42441,75059,136952,246679,412665,733382, 1257481,2091961,3663072,6227075,10803977,19052546, 32098911,52965587,89028280,146743321,246148917, 447621406] |