# A151447 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 39 5 130 6 514 7 1943 8 7872 9 31706 10 131650 11 549751 12 2331370 13 9963328 14 42980063 15 186704975 16 816434120 17 3590695220 18 15873104022 19 70496228150 20 314392868577 21 1407453308237 22 6322525455282 23 28492055193081 24 128770519635266 25 583542383148631 26 2650954842074021 27 12070587215220593