# A151416 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 13 5 37 6 109 7 334 8 1049 9 3367 10 10992 11 36399 12 121982 13 412969 14 1410446 15 4854123 16 16818222 17 58617286 18 205384162 19 723043647 20 2556317905 21 9072825097 22 32314370528 23 115462754160 24 413775789826 25 1486835229283 26 5356049103946 27 19338799943334 28 69975443521895 29 253704568761743 30 921550558422286 31 3353248008103356