# A180437 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 6 4 24 5 78 6 186 7 372 8 876 9 1632 10 3024 11 5310 12 8496 13 13344 14 21186 15 31878 16 46752 17 66936 18 94800 19 130194