n | a(n) |
---|---|
12 | 1 |
13 | 13 |
14 | 91 |
15 | 455 |
16 | 1820 |
17 | 6188 |
18 | 18564 |
19 | 50388 |
20 | 125970 |
21 | 293930 |
22 | 646646 |
23 | 1352078 |
24 | 2704156 |
25 | 5200300 |
26 | 9657700 |
27 | 17383860 |
28 | 30421755 |
29 | 51895935 |
30 | 86493225 |
31 | 141120525 |
32 | 225792840 |
33 | 354817320 |
34 | 548354040 |
35 | 834451800 |
36 | 1251677700 |
37 | 1852482996 |
38 | 2707475148 |
39 | 3910797436 |
40 | 5586853480 |
[1,13,91,455,1820,6188,18564,50388,125970,293930, 646646,1352078,2704156,5200300,9657700,17383860, 30421755,51895935,86493225,141120525,225792840, 354817320,548354040,834451800,1251677700, 1852482996,2707475148,3910797436,5586853480] |