# A037676 (b-file synthesized from sequence entry)
1 1
2 6
3 38
4 231
5 1387
6 8322
7 49934
8 299607
9 1797643
10 10785858
11 64715150
12 388290903
13 2329745419
14 13978472514
15 83870835086
16 503225010519
17 3019350063115
18 18116100378690
19 108696602272142
20 652179613632855
21 3913077681797131