# A358265 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 28
5 160
6 1080
7 8470
8 76160
9 771120
10 8671600
11 107245600
12 1446984000
13 21150929800
14 332950217600
15 5615507898000
16 101024594070400
17 1931055071545600
18 39082823446867200
19 834945681049480000
20 18776164188349568000
21 443348081412556320000