# A137400 (b-file synthesized from sequence entry)
0 6
1 30
2 140
3 631
4 2786
5 12136
6 52368
7 224406
8 956516
9 4060038
10 17175132
11 72454075
12 304941386
13 1280898304
14 5371301504
15 22491017758
16 94055344244
17 392888085100
18 1639534704632
19 6835739258998
20 28477594607348
21 118551827347576