# A177125 (b-file synthesized from sequence entry)
0 1
1 9
2 21
3 127
4 637
5 4007
6 24821
7 164659
8 1106197
9 7642295
10 53521277
11 380565539
12 2735155565
13 19854481655
14 145295269157
15 1070969265539
16 7943300521541
17 59241248227575
18 443987081678157
19 3342101935397795
20 25256877059336861