# A367081 (b-file synthesized from sequence entry) 0 1 1 3 2 4 3 6 4 8 5 12 6 38 7 24 8 18 9 36 10 48 11 20 12 248 13 588 14 144 15 252 16 5520 17 168 18 7200 19 2400 20 2850