# A273590 (b-file synthesized from sequence entry)
10 1
11 20
12 328
13 4770
14 66878
15 881044
16 11345200
17 143582500
18 1810580532
19 22845779214
20 289758406436
21 3699018969840
22 47578794728944
23 616911019060838
24 8069080071958188
25 106539250822676328
26 1420990036454689148
27 19157908196042318138
28 261230865243883014080