# A000506 (b-file synthesized from sequence entry)
6 61
7 841
8 7311
9 51663
10 325446
11 1910706
12 10715506
13 58258210
14 309958755
15 1623847695
16 8412276585
17 43220104041
18 220683627988
19 1121561317408
20 5679711010548
21 28683869195556
22 144552802373145
23 727271783033445