Smallest semiprime containing exactly n 2's.

A104669

Smallest semiprime containing exactly n 2's.

Terms

    a(0) =21a(1) =22a(2) =2122a(3) =20222a(4) =202222a(5) =1222222a(6) =22220222a(7) =122222222a(8) =2222222221a(9) =22222222226a(10) =202222222222

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