# A025933 (b-file synthesized from sequence entry)
0 1
1 19
2 240
3 2570
4 25391
5 240489
6 2226310
7 20352640
8 184772181
9 1670999759
10 15079423580
11 135917468310
12 1224272081371
13 11023527831829
14 99237160300050
15 893261534749580
16 8039989402000961
17 72363082951440699
18 651283639391863720
19 5861632222156996450
20 52755087348022338951