# A356837 (b-file synthesized from sequence entry)
0 1
1 20
2 260
3 3212
4 39470
5 484760
6 5953532
7 73117640
8 897985850
9 11028509072
10 135445355180
11 1663456422080
12 20429547136382
13 250903113935780
14 3081437496506420
15 37844317258279532
16 464780593592780450
17 5708148959489987900
18 70103969470537620692
19 860973771077827270580