2,0,1,1,1
3,1,2,2,2
4,2,3,6,6
5,4,5,15,15
6,7,8,40,40
7,12,13,104,104
8,20,21,273,273
9,33,34,714,714
10,54,55,1870,1870
11,88,89,4895,4895
12,143,144,12816,12816
13,232,233,33552,33552
14,376,377,87841,87841
15,609,610,229970,229970
16,986,987,602070,602070
17,1596,1597,1576239,1576239
18,2583,2584,4126648,4126648
19,4180,4181,10803704,10803704
20,6764,6765,28284465,28284465
21,10945,10946,74049690,74049690
22,17710,17711,193864606,193864606
23,28656,28657,507544127,507544127