# A107068 (b-file synthesized from sequence entry) 0 1 1 -3 2 6 3 -10 4 16 5 -27 6 49 7 -92 8 172 9 -316 10 573 11 -1035 12 1874 13 -3406 14 6204 15 -11303 16 20577 17 -37432 18 68072 19 -123800 20 225193 21 -409683 22 745342 23 -1355970 24 2466760 25 -4487395 26 8163217 27 -14850196 28 27015092 29 -49145300 30 89404037 31 -162641499 32 295872778 33 -538243174 34 979156724 35 -1781254927 36 3240410561