# A143558 (b-file synthesized from sequence entry)
0 1
1 1
2 10
3 50
4 570
5 4450
6 56202
7 501970
8 6676410
9 63799490
10 875391370
11 8715058802
12 122088479930
13 1249437863970
14 17764858122250
15 185445650940690
16 2666213981716282
17 28252030821781890
18 409717783914784010