# A000236 (b-file synthesized from sequence entry)
2 3
3 8
4 20
5 44
6 80
7 343
8 288
9 608
10 1023
11 2848
12 4095
13 40959
14 16383
15 32768
16 11375
17 655360
18 262143
19 3670016
20 1048575
21 2097151