# A174493 (b-file synthesized from sequence entry)
1 1
2 3
3 15
4 102
5 861
6 8598
7 98547
8 1270160
9 18138601
10 283754826
11 4818884319
12 88186786020
13 1728395865021
14 36091833338174
15 799408841413051
16 18708996086926272
17 461095012437724881
18 11931573394008790290