# A083319 (b-file synthesized from sequence entry)
0 1
1 5
2 21
3 83
4 321
5 1235
6 4761
7 18443
8 71841
9 281315
10 1106601
11 4369403
12 17304561
13 68694995
14 273202041
15 1088057963
16 4337948481
17 17308878275
18 69106635081
19 276039644123
20 1102997363601
21 4408504767155
22 17623562909721
23 70462878967883