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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The two factors 10 and 1 of this linear combination could be replaced by any other pair of integers.
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FORMULA
| a(n) = 10*prime(2n-2)+prime(2n-1), n>1.
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MAPLE
| A008578 := proc(n) if n = 1 then 1; else ithprime(n-1) ; end if; end proc:
A142074 := proc(n) 10*A008578(2*n-1)+A008578(2*n) ; end proc: # R. J. Mathar, Jul 07 2011
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CROSSREFS
| Sequence in context: A053682 A033570 A163661 * A102085 A058968 A195858
Adjacent sequences: A142071 A142072 A142073 * A142075 A142076 A142077
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KEYWORD
| nonn,easy,less
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Sep 15 2008
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