# A129323 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 18
4 88
5 470
6 2724
7 17010
8 113712
9 809262
10 6101820
11 48540778
12 405935688
13 3557404838
14 32577733972
15 310987560930
16 3087723669600
17 31823217868318
18 339845199259500
19 3754422961010522
20 42843681016834680
21 504339820818380694