# A023373 (b-file synthesized from sequence entry)
1 4
2 5
3 6
4 7
5 8
6 10
7 12
8 15
9 18
10 27
11 38
12 57
13 86
14 157
15 291
16 678
17 1557
18 4406
19 16332
20 58515
21 269028
22 1976680
23 16444560
24 180744025
25 3078792661
26 81397457281
27 4230590813376
28 348816568612875
29 68297288451850013
30 26970387494194667541