# A084930 (b-file synthesized from sequence entry) 0 1 1 -3 2 4 3 5 4 -20 5 16 6 -7 7 56 8 -112 9 64 10 9 11 -120 12 432 13 -576 14 256 15 -11 16 220 17 -1232 18 2816 19 -2816 20 1024 21 13 22 -364 23 2912 24 -9984 25 16640 26 -13312 27 4096 28 -15 29 560 30 -6048 31 28800 32 -70400 33 92160 34 -61440 35 16384 36 17 37 -816 38 11424 39 -71808 40 239360 41 -452608 42 487424 43 -278528 44 65536 45 -19 46 1140 47 -20064 48 160512 49 -695552