# A137388 (b-file synthesized from sequence entry) 0 -1 1 -1 2 0 3 -1 4 0 5 6 6 -1 7 0 8 15 9 20 10 -1 11 0 12 27 13 64 14 45 15 -1 16 0 17 42 18 140 19 175 20 84 21 -1 22 0 23 60 24 256 25 450 26 384 27 140 28 -1 29 0 30 81 31 420 32 945 33 1134 34 735 35 216 36 -1 37 0 38 105 39 640 40 1750 41 2688 42 2450 43 1280 44 315 45 -1 46 0 47 132 48 924 49 2970 50 5544 51 6468 52 4752 53 2079 54 440 55 -1 56 0 57 162 58 1280 59 4725 60 10368 61 14700 62 13824 63 8505 64 3200 65 594