# A275778 (b-file synthesized from sequence entry) 0 1 1 2 2 1 3 4 4 7 5 12 6 23 7 42 8 77 9 142 10 261 11 480 12 883 13 1624 14 2987 15 5494 16 10105 17 18586 18 34185 19 62876 20 115647 21 212708 22 391231 23 719586 24 1323525 25 2434342 26 4477453 27 8235320 28 15147115 29 27859888 30 51242323 31 94249326 32 173351537 33 318843186 34 586444049