n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 13 |
3 | 42 |
4 | 117 |
5 | 310 |
6 | 785 |
7 | 1896 |
8 | 4433 |
9 | 10062 |
10 | 22248 |
11 | 48080 |
12 | 101821 |
13 | 211682 |
14 | 432795 |
15 | 871520 |
16 | 1730491 |
17 | 3391894 |
18 | 6568996 |
19 | 12580316 |
20 | 23841774 |
21 | 44742634 |
22 | 83193865 |
23 | 153347110 |
24 | 280336704 |
25 | 508499474 |
26 | 915540681 |
27 | 1636805438 |
28 | 2906642396 |
29 | 5128530946 |
30 | 8993376689 |
[1,4,13,42,117,310,785,1896,4433,10062,22248, 48080,101821,211682,432795,871520,1730491,3391894, 6568996,12580316,23841774,44742634,83193865, 153347110,280336704,508499474,915540681, 1636805438,2906642396,5128530946,8993376689] |