n | a(n) |
---|---|
0 | 1 |
1 | 1 |
2 | 2 |
3 | 6 |
4 | 21 |
5 | 76 |
6 | 275 |
7 | 989 |
8 | 3544 |
9 | 12696 |
10 | 45578 |
11 | 164194 |
12 | 593966 |
13 | 2158090 |
14 | 7875503 |
15 | 28862235 |
16 | 106203597 |
17 | 392291117 |
18 | 1454239837 |
19 | 5409048372 |
20 | 20182045236 |
21 | 75522431214 |
22 | 283377791271 |
23 | 1065990318403 |
24 | 4019415215923 |
25 | 15188857311110 |
26 | 57514327098488 |
27 | 218201177979480 |
28 | 829305547436095 |
[1,1,2,6,21,76,275,989,3544,12696,45578,164194, 593966,2158090,7875503,28862235,106203597, 392291117,1454239837,5409048372,20182045236, 75522431214,283377791271,1065990318403, 4019415215923,15188857311110,57514327098488, 218201177979480,829305547436095] |