# A121649 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 3 5 5 6 8 7 16 8 27 9 51 10 89 11 170 12 300 13 564 14 1008 15 1972 16 3563 17 6847 18 12483 19 24340 20 44583 21 86071 22 158600 23 309554 24 572548 25 1108068 26 2057792 27 4003278 28 7451924 29 14415482 30 26913176 31 52545636 32 98321435 33 190858943 34 358017691 35 698449146