# A011840 (b-file synthesized from sequence entry)
1 1
2 2
3 12
4 233
5 13027
6 2054860
7 902972232
8 1088301119016
9 3548682190216501
10 30975390230263001230
11 718172054909597874684616
12 43989826242167986964609396098
13 7092859798789990177772152185478717