# A289715 (b-file synthesized from sequence entry)
1 1
2 4
3 24
4 128
5 610
6 2742
7 11970
8 51424
9 218718
10 923690
11 3879766
12 16224804
13 67603744
14 280816018
15 1163381190
16 4808642880
17 19835652598
18 81676217394
19 335780005758
20 1378465287820
21 5651707681200
22 23145088600458
23 94684453366894
24 386971244196648
25 1580132580471300
26 6446940928324702