# A074446 (b-file synthesized from sequence entry)
1 1
2 0
3 2
4 6
5 15
6 40
7 153
8 528
9 1841
10 6528
11 23901
12 87550
13 322875
14 1198080
15 4474738
16 16779264
17 63164175
18 238605640
19 904213989
20 3436000050
21 13089461538
22 49977753600
23 191219550297
24 733008101200
25 2814750270420
26 10825959997440
27 41699998413248
28 160842848628150
29 621186162441675