# A006363 (b-file synthesized from sequence entry)
0 1
1 168
2 7581
3 160948
4 2068224
5 18561984
6 127234008
7 706987164
8 3320153661
9 13583619496
10 49530070161
11 163806121656
12 498180781144
13 1408758106368
14 3737505070344
15 9372218674824
16 22351423903953
17 50960797533096
18 111574385244253
19 235475590500876
20 480631725411720
21 951504952784320
22 1831615165328400
23 3435931869872580