r c r r d r d r

r c(r) ?r 1/2? d(r) 0.5? d(r) 1 1 1 ?1/2 ?(0.5) 2 3 4 0 0. 3 4 12 1/12 (8.3)10?2 4 8 24 1/24 (4.2)10?2 5 9 240 0 0. 6 11 240 1/60 (1.7)10?2 7 12 1680 5/56 (8.9)10?2 8 20 3360 0 0. 9 21 10080 1/56 (1.8)10?2 10 23 10080 0 0. 11 24 110880 1/616 (1.6)10?3 12 28 110880 1/660 (1.5)10?3 13 29 1441440 ?5/1092 ?(4.6)10?3 14 31 1441440 ?1/80080 ?(1.2)10?5 15 32 1441440 133/68640 (1.9)10?3 16 48 2882880 63/22880 (2.8)10?3 17 49 49008960 5/272272 (1.8)10?5 18 51 49008960 3/1361360 (2.2)10?6 19 52 931170240 27/55328 (4.9)10?4 20 56 931170240 89/13302432 (6.7)10?6 21 57 931170240 ?9/146965 ?(6.1)10?5 22 59 931170240 ?1/23279256 ?(4.3)10?8 23 60 21416915520 ?945/8498776 ?(1.1)10?4 24 68 42833831040 27/3979360 (6.8)10?6 25 69 214169155200 11/489440 (2.2)10?5 26 71 214169155200 0 0.

• fl? ?