# A064670 (b-file synthesized from sequence entry)
1 1
2 1
3 4
4 5
5 20
6 36
7 61
8 244
9 504
10 576
11 1385
12 5540
13 11916
14 17280
15 14400
16 50521
17 202084
18 442224
19 697536
20 792000
21 518400
22 2702765
23 10811060
24 23870196
25 39202560
26 50198400
27 47174400
28 25401600
29 199360981
30 797443924
31 1769923944