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A142074
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Prime number superposition a(n) = 10*A008578(2n-1) + A008578(2n).
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1
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12, 35, 81, 147, 213, 321, 411, 477, 589, 677, 783, 873, 987, 1113, 1179, 1257, 1447, 1539, 1667, 1797, 1909, 2001, 2127, 2201, 2457, 2523, 2631, 2767, 2899, 2987, 3093, 3237, 3423, 3501, 3717, 3843, 3957, 4109, 4219, 4371
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OFFSET
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1,1
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COMMENTS
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The two factors 10 and 1 of this linear combination could be replaced by any other pair of integers.
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LINKS
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FORMULA
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a(n) = 10*prime(2n-2)+prime(2n-1), n>1.
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MAPLE
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A008578 := proc(n) if n = 1 then 1; else ithprime(n-1) ; end if; end proc:
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MATHEMATICA
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Join[{12}, 10#[[1]]+#[[2]]&/@Partition[Prime[Range[2, 80]], 2]] (* Harvey P. Dale, Aug 11 2017 *)
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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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