# A089325 (b-file synthesized from sequence entry) 1 3 2 6 3 18 4 54 5 162 6 486 7 972 8 1944 9 5832 10 40824 11 204120 12 408240 13 816480 14 1632960 15 3265920 16 6531840 17 26127360 18 130636800 19 391910400 20 1175731200 21 14108774400 22 56435097600 23 1241572147200 24 8691005030400 25 26073015091200 26 260730150912000