a(n+1)=a(n)+2,n=47,386,868,1000,1247,1521,1834,2271,2435,2437,2468,2483,2811,2819,2960,3202,3531,3581,5021,5178,5245,5669,6009,6087,6198,6686,7017,7029,7454,7576,7699,8557,8940,9018,10130,10240,10449,10578,10952,11070,11103,11199。。。
例如,a(42)=4481,a(43)=4483。
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