# A163174 (b-file synthesized from sequence entry)
0 1
1 24
2 552
3 12696
4 291732
5 6703488
6 154034496
7 3539441664
8 81330144060
9 1868823662376
10 42942280730712
11 986738081076264
12 22673505553878564
13 520997277758500752
14 11971601073631152624
15 275086336118245407888