# A319283 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 6 4 17 5 54 6 153 7 552 8 2057 9 8394 10 35539 11 166926 12 856189 13 4674890 14 27358553 15 171129072 16 1141190303 17 8017021932 18 59365844491 19 461939618824