# A218309 (b-file synthesized from sequence entry) 0 1 1 4 2 56 3 1264 4 40640 5 1711744 6 89533184 7 5607463936 8 409621790720 9 34218229227520 10 3219000547131392 11 336858779869020160 12 38823224436435845120 13 4886982191317154529280 14 667188807538423365632000 15 98200163047169655115350016 16 15501781660715229538766815232