# A346970 (b-file synthesized from sequence entry) 1 2 2 3 3 5 4 10 5 21 6 55 7 182 8 357 9 1105 10 2958 11 16588 12 51243 13 106981 14 608685 15 3003455 16 7497910 17 52350909 18 168539462 19 1822961393 20 3079378759