# A303397 (b-file synthesized from sequence entry) 0 1 1 -4 2 4 3 -4 4 20 5 -36 6 52 7 -116 8 244 9 -500 10 964 11 -1876 12 3876 13 -7780 14 15332 15 -30628 16 61684 17 -123460 18 246036 19 -491988 20 985492 21 -1971284 22 3939556 23 -7878068 24 15762692 25 -31527428 26 63041220 27 -126078916 28 252185044 29 -504375460 30 1008698036 31 -2017385268 32 4034873268