# A335345 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 9
4 75
5 690
6 7305
7 89145
8 1237425
9 19221300
10 329371245
11 6157738125
12 124551652995
13 2707913238030
14 62945320162725
15 1557291398788125
16 40844991621859425
17 1131753403094113800
18 33025920511859300025
19 1012128709342410284625
20 32494107983067177522075