Minimal number k such that (2k)^(2^n) + 1 is prime, but (2k)^(2^m) + 1 is composite for m < n.

A122528

Minimal number k such that (2k)^(2^n) + 1 is prime, but (2k)^(2^m) + 1 is composite for m < n.

Terms

    a(0) =1a(1) =7a(2) =17a(3) =76a(4) =22a(5) =57a(6) =137a(7) =117a(8) =307a(9) =671a(10) =412a(11) =1279a(12) =767a(13) =35926a(14) =50915a(15) =35453a(16) =24297a(17) =114094a(18) =12259a(19) =37949a(20) =459722

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