# A005720 (b-file synthesized from sequence entry)
2 1
3 10
4 44
5 135
6 336
7 728
8 1428
9 2598
10 4455
11 7282
12 11440
13 17381
14 25662
15 36960
16 52088
17 72012
18 97869
19 130986
20 172900
21 225379
22 290444
23 370392
24 467820
25 585650
26 727155
27 895986
28 1096200
29 1332289
30 1609210
31 1932416
32 2307888
33 2742168
34 3242393
35 3816330
36 4472412
37 5219775