# A212196 (b-file synthesized from sequence entry) 0 1 1 -1 2 2 3 -8 4 8 5 -32 6 6112 7 -3712 8 362624 9 -71706112 10 3341113856 11 -79665268736 12 1090547664896 13 -38770843648 14 106053090598912 15 -5507347586961932288 16 136847762542978039808 17 -45309996254420664320 18 3447910579774800362340352 19 -916174777198089643491328