A091251 A014580-indices of nonprimitive irreducible GF(2)[X]-polynomials.
1, 8, 16, 17, 23, 42, 46, 47, 54, 55, 57, 59, 60, 62, 63, 66, 67, 69, 71, 72, 74, 79, 82, 89, 100, 107, 117
Offset: 1
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