# A027019 (b-file synthesized from sequence entry)
3 1
4 11
5 267
6 2620
7 16305
8 77040
9 303553
10 1055231
11 3358268
12 10039132
13 28714818
14 79649852
15 216360858
16 579601543
17 1538746237
18 4061993928
19 10685640859
20 28051744332
21 73551897971
22 192720956939
23 504774508726
24 1321827638248
25 3461013838244
26 9061623069576
27 23724397134644