# A078053 (b-file synthesized from sequence entry) 0 1 1 -3 2 8 3 -20 4 50 5 -124 6 308 7 -764 8 1896 9 -4704 10 11672 11 -28960 12 71856 13 -178288 14 442368 15 -1097600 16 2723360 17 -6757184 18 16765888 19 -41599424 20 103216256 21 -256099584 22 635432832 23 -1576632320 24 3911931136 25 -9706261248 26 24083120128 27 -59754900480 28 148263518720 29 -367870598144