n | a(n) |
---|---|
1 | 1 |
2 | 15 |
3 | 50 |
4 | 254 |
5 | 1202 |
6 | 5774 |
7 | 27650 |
8 | 132494 |
9 | 634802 |
10 | 3041534 |
11 | 14572850 |
12 | 69822734 |
13 | 334540802 |
14 | 1602881294 |
15 | 7679865650 |
16 | 36796446974 |
17 | 176302369202 |
18 | 844715399054 |
19 | 4047274626050 |
20 | 19391657731214 |
21 | 92911014030002 |
22 | 445163412418814 |
23 | 2132906048064050 |
24 | 10219366827901454 |
25 | 48963928091443202 |
[1,15,50,254,1202,5774,27650,132494,634802, 3041534,14572850,69822734,334540802,1602881294, 7679865650,36796446974,176302369202,844715399054, 4047274626050,19391657731214,92911014030002, 445163412418814,2132906048064050, 10219366827901454,48963928091443202] |