# A137481 (b-file synthesized from sequence entry) 1 1 2 8 3 3 4 24 5 48 6 9 7 -192 8 216 9 216 10 27 11 -2976 12 -2304 13 1296 14 864 15 81 16 -57600 17 -44640 18 -17280 19 6480 20 3240 21 243 22 -1336320 23 -1036800 24 -401760 25 -103680 26 29160 27 11664 28 729 29 -36126720 30 -28062720 31 -10886400 32 -2812320 33 -544320 34 122472 35 40824 36 2187 37 -1114767360 38 -867041280 39 -336752640 40 -87091200