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A174008
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n-th prime plus n-th even nonnegative nonprime.
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3
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2, 7, 11, 15, 21, 25, 31, 35, 41, 49, 53, 61, 67, 71, 77, 85, 93, 97, 105, 111, 115, 123, 129, 137, 147, 153, 157, 163, 167, 173, 189, 195, 203, 207, 219, 223, 231, 239, 245, 253, 261, 265, 277, 281, 287, 291, 305, 319, 325, 329, 335, 343, 347, 359, 367, 375
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OFFSET
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1,1
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COMMENTS
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Apart from the first term, same as A078916 = prime(n) + 2n.
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LINKS
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FORMULA
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a(n) ~ n log n.
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EXAMPLE
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a(1)=2 because 2+0=2; a(2)=7 because 3+4=7.
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MAPLE
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A163300 := proc(n) option remember ; if n = 1 then 0; else for a from procname(n-1)+2 by 2 do if not isprime(a) then return a ; end if; end do; end if; end proc:
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CROSSREFS
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KEYWORD
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nonn,easy,less
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AUTHOR
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STATUS
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approved
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