# A074417 (b-file synthesized from sequence entry)
1 1
2 1
3 2
4 5
5 25
6 104
7 450
8 1935
9 8666
10 39050
11 177784
12 814006
13 3756250
14 17437275
15 81380200
16 381468750
17 1795156250
18 8477078967
19 40154687500
20 190734843750
21 908261625600
22 4334883611534
23 20732050781250
24 99341072183730
25 476837158203125
26 2292486335637500