# A064568 (b-file synthesized from sequence entry) 1 1 2 3 3 11 4 21 5 39 6 76 7 248 8 844 9 1520 10 2752 11 9317 12 17223 13 31221 14 57071 15 99741 16 589932 17 58056875 18 101769229 19 302890748 20 511561220 21 904036924 22 39488697700 23 325374626148 24 535755688021 25 1404720439053 26 3883018238329 27 6283167591179 28 16166305650060 29 25735985498861 30 40806937801472