# A140974 (b-file synthesized from sequence entry)
0 1
1 2
2 3
3 4
4 8
5 16
6 43
7 136
8 513
9 2662
10 15276
11 134366
12 1233504
13 18634052
14 281749759
15 7363023774
16 187712397424
17 8557170854702
18 375321111906249