# A028340 (b-file synthesized from sequence entry)
3 1
4 16
5 230
6 3480
7 57379
8 1038016
9 20570444
10 444647600
11 10431670821
12 264300628944
13 7198061846898
14 209814739262856
15 6520139954328519
16 215245451727154944
17 7524314127912551832
18 277705505168550027360