# A072844 (b-file synthesized from sequence entry)
1 0
2 0
3 0
4 1
5 9
6 55
7 286
8 1365
9 6188
10 27132
11 116281
12 490337
13 2043275
14 8439210
15 34621041
16 141290436
17 574274008
18 2326683921
19 9402807817
20 37923176863
21 152705590518
22 614111175965
23 2467123420524
24 9903167265124
25 39725253489545