# A005495 (b-file synthesized from sequence entry)
0 4
1 16
2 88
3 538
4 3568
5 24596
6 176354
7 1298732
8 9788838
9 75190990
10 586994548
11 4646450800
12 37225608048
13 301400446752
14 2463161448024
15 20297411421166
16 168503717726980
17 1408243135178256
18 11840473621942108
19 100102553809842544