# A136594 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 8
4 26
5 70
6 820
7 5152
8 20316
9 388712
10 3666188
11 17298908
12 501805832
13 6256792412
14 33844737292
15 1353617016078
16 20960708128068
17 137741948419428
18 6588092586831028
19 121860622573650906
20 924837580461274556