# A075872 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 5
5 42
6 132
7 1144
8 3978
9 35530
10 690690
11 2731365
12 50067108
13 429757960
14 1822766520
15 15991836267
16 280086337895
17 4703540164785
18 21512315482350
19 360471372561300
20 3174207914954076
21 14859478810664136
22 248599618581498860
23 2209822117125283440
24 36246606227404101045