# A004365 (b-file synthesized from sequence entry)
10 1
11 66
12 2556
13 76076
14 1929501
15 43949268
16 927048304
17 18466953120
18 352025629371
19 6481773410772
20 116068178638776
21 2031659407077300
22 34898565177533200
23 590080113475142976
24 9844971586905715128