a(1) = 3; a(2n) = smallest prime starting (most significant digits) with a(2n-1). a(2n+1) = smallest prime ending (least significant digits)in a(2n).

A069630

a(1) = 3; a(2n) = smallest prime starting (most significant digits) with a(2n-1). a(2n+1) = smallest prime ending (least significant digits)in a(2n).

Terms

    a(0) =3a(1) =31a(2) =131a(3) =1319a(4) =21319a(5) =213193a(6) =12213193a(7) =122131939a(8) =1122131939a(9) =112213193909

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