# A078055 (b-file synthesized from sequence entry) 0 1 1 -3 2 8 3 -24 4 70 5 -204 6 596 7 -1740 8 5080 9 -14832 10 43304 11 -126432 12 369136 13 -1077744 14 3146624 15 -9187008 16 26822752 17 -78312768 18 228645056 19 -667561152 20 1949037952 21 -5690488320 22 16614174848 23 -48507402240 24 141624130816 25 -413491415808 26 1207245897728 27 -3524722888704 28 10290920404480