# A037760 (b-file synthesized from sequence entry)
1 3
2 18
3 109
4 656
5 3939
6 23634
7 141805
8 850832
9 5104995
10 30629970
11 183779821
12 1102678928
13 6616073571
14 39696441426
15 238178648557
16 1429071891344
17 8574431348067
18 51446588088402
19 308679528530413
20 1852077171182480