# A077920 (b-file synthesized from sequence entry) 0 1 1 -1 2 4 3 -7 4 18 5 -38 6 88 7 -195 8 441 9 -988 10 2223 11 -4992 12 11220 13 -25208 14 56645 15 -127277 16 285992 17 -642615 18 1443946 19 -3244514 20 7290360 21 -16381287 22 36808421 23 -82707768 24 185842671 25 -417584688 26 938304280 27 -2108350576 28 4737420745 29 -10644887785 30 23918845740 31 -53745158519 32 120764274994