A379054 a(n) = composite(2*n+2) - composite(2*n).
3, 3, 3, 3, 3, 3, 2, 2, 4, 2, 2, 3, 3, 3, 3, 2, 2, 3, 2, 3, 3, 2, 3, 2, 4, 2, 2, 3, 3, 2, 2, 3, 2, 2, 3, 2, 4, 2, 4, 2, 3, 2, 2, 2, 2, 2, 3, 2, 3, 2, 3, 3, 2, 2, 2, 3, 3, 2, 3, 2, 2, 3, 3, 2, 2, 3, 2, 3, 3, 2, 2, 2, 3, 3, 3, 3, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 3, 3, 3, 3
Offset: 1
Keywords
Links
- Paolo Xausa, Table of n, a(n) for n = 1..10000
Programs
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Mathematica
Differences[Select[Range[300], CompositeQ][[2 ;; ;; 2]]] (* Paolo Xausa, Dec 18 2024 *)
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