# A377013 (b-file synthesized from sequence entry) 0 2 1 2 2 5 3 16 4 64 5 321 6 1927 7 13490 8 107921 9 971290 10 9712901 11 106841912 12 1282102945 13 16667338286 14 233342736005 15 3500141040076 16 56002256641217 17 952038362900690 18 17136690532212421 19 325597120112036000 20 6511942402240720001 21 136750790447055120022 22 3008517389835212640485