# A026713 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 7 5 12 6 22 7 39 8 66 9 118 10 208 11 350 12 619 13 1085 14 1820 15 3198 16 5582 17 9344 18 16347 19 28443 20 47542 21 82910 22 143909 23 240276 24 418024 25 724191 26 1208106 27 2097918 28 3628929 29 6049752 30 10490112 31 18123181 32 30196610 33 52297856