# A207970 (b-file synthesized from sequence entry)
0 1
1 5
2 15
3 140
4 1505
5 21875
6 319620
7 4936985
8 77358485
9 1236083870
10 19982821875
11 326511608255
12 5379199407890
13 89249496596015
14 1489580814490755
15 24988546214618750
16 421055477328447620
17 7122346563647277860
18 120891417096833214485
19 2058225554792946621495