n | a(n) |
---|---|
0 | 1 |
1 | 4 |
2 | 14 |
3 | 40 |
4 | 105 |
5 | 251 |
6 | 570 |
7 | 1226 |
8 | 2540 |
9 | 5075 |
10 | 9855 |
11 | 18630 |
12 | 34439 |
13 | 62340 |
14 | 110805 |
15 | 193624 |
16 | 333235 |
17 | 565415 |
18 | 947040 |
19 | 1567130 |
20 | 2564425 |
21 | 4152535 |
22 | 6658711 |
23 | 10579380 |
24 | 16663755 |
25 | 26033200 |
26 | 40357641 |
27 | 62106290 |
28 | 94912385 |
29 | 144088840 |
30 | 217368655 |
31 | 325945320 |
32 | 485950150 |
33 | 720515475 |
[1,4,14,40,105,251,570,1226,2540,5075,9855,18630, 34439,62340,110805,193624,333235,565415,947040, 1567130,2564425,4152535,6658711,10579380,16663755, 26033200,40357641,62106290,94912385,144088840, 217368655,325945320,485950150,720515475] |