# A149865 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 13 4 40 5 131 6 452 7 1572 8 5692 9 21031 10 79417 11 302186 12 1169670 13 4574232 14 18083006 15 71931274 16 288765763 17 1166819602 18 4744411047 19 19384558408 20 79648672433 21 328754264401 22 1362556419965 23 5668293251091 24 23670909753372 25 99178834662469 26 416791226821262 27 1756590772659012 28 7424025056902146