# A147535 (b-file synthesized from sequence entry)
0 5
1 18
2 64
3 228
4 820
5 2988
6 11044
7 41388
8 157060
9 602508
10 2332324
11 9095148
12 35676100
13 140586828
14 555986404
15 2204846508
16 8762055940
17 34876167948
18 138988373284
19 554404335468
20 2212969344580