# A164584 (b-file synthesized from sequence entry)
0 1
1 6
2 12
3 136
4 272
5 3168
6 6336
7 73856
8 147712
9 1721856
10 3443712
11 40142848
12 80285696
13 935878656
14 1871757312
15 21818802176
16 43637604352
17 508677193728
18 1017354387456
19 11859151814656
20 23718303629312
21 276480808452096