# A308433 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 8 5 15 6 36 7 84 8 200 9 468 10 1130 11 2717 12 6576 13 15938 14 38780 15 94485 16 230816 17 564553 18 1383318 19 3393742 20 8336960 21 20502216 22 50472928 23 124369832 24 306729456 25 757078000 26 1870040822 27 4622317812 28 11432698704 29 28294211920 30 70063292310 31 173584768088 32 430276174016 33 1067049650238