# A135338 (b-file synthesized from sequence entry) 1 1 2 -1 3 1 4 1 5 -3 6 1 7 -2 8 7 9 -6 10 1 11 6 12 -20 13 25 14 -10 15 1 16 -24 17 76 18 -105 19 65 20 -15 21 1 22 120 23 -364 24 511 25 -385 26 140 27 -21 28 1 29 -720 30 2108 31 -2940 32 2401 33 -1120 34 266 35 -28 36 1 37 5040 38 -14328 39 19720 40 -16632 41 8841 42 -2772 43 462 44 -36 45 1 46 -40320 47 111816 48 -151620 49 129340 50 -73605 51 27237 52 -6090 53 750 54 -45 55 1