# A339600 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 14 5 34 6 76 7 172 8 404 9 928 10 2112 11 4880 12 11256 13 25784 14 59288 15 136584 16 313800 17 721096 18 1659176 19 3815144 20 8769320 21 20166568 22 46375784 23 106621992 24 245160040 25 563747880 26 1296231400