# A373518 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 1
4 17
5 81
6 241
7 3361
8 32481
9 183457
10 2534561
11 36903681
12 325995121
13 4808334961
14 90981786897
15 1126128625441
16 18354227120321
17 415821040873281
18 6714588707173441
19 122710186163310337
20 3174234862391072721
21 63597591858999638161
22 1308604168710672673841