# A046995 (b-file synthesized from sequence entry)
1 1
2 4
3 17
4 52
5 160
6 469
7 1337
8 3750
9 10347
10 28249
11 76382
12 204996
13 546651
14 1449952
15 3828232
16 10067585
17 26384939
18 68941126
19 179658343
20 467084601
21 1211812016
22 3138075544
23 8112667259
24 20941558268
25 53983767498