# A121349 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 13 4 25 5 50 6 101 7 201 8 402 9 804 10 1608 11 3217 12 6434 13 12868 14 25736 15 51472 16 102944 17 205887 18 411775 19 823550 20 1647099 21 3294199 22 6588397 23 13176795 24 26353589 25 52707179 26 105414357 27 210828714 28 421657428 29 843314857 30 1686629713 31 3373259426