# A120262 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 7 4 14 5 30 6 83 7 255 8 807 9 2482 10 7399 11 21518 12 61752 13 176385 14 504181 15 1445159 16 4153716 17 11960039 18 34463630 19 99316022 20 286133435 21 824112803 22 2373059251 23 6832536414 24 19671776119 25 56638681010 26 163078362040 27 469559902129 28 1352048562017 29 3893102975595 30 11209833959312