# A001282 (b-file synthesized from sequence entry)
6 17
7 259
8 2770
9 27978
10 294602
11 3331790
12 40682144
13 535206440
14 7557750635
15 114101726625
16 1834757172082
17 31313852523634
18 565434670633580
19 10771030900532868
20 215881317066455232
21 4541623615098815280