# A149207 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 40 5 129 6 549 7 1933 8 8502 9 31708 10 142109 11 549108 12 2494264 13 9891529 14 45352455 15 183421419 16 847068443 17 3478366440 18 16154265409 19 67150019188 20 313261541733 21 1315277095648 22 6158394389696 23 26075273852257 24 122461840619532 25 522243214701570 26 2459029674132398 27 10551608705702006