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A052147
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a(n) = prime(n) + 2.
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23
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4, 5, 7, 9, 13, 15, 19, 21, 25, 31, 33, 39, 43, 45, 49, 55, 61, 63, 69, 73, 75, 81, 85, 91, 99, 103, 105, 109, 111, 115, 129, 133, 139, 141, 151, 153, 159, 165, 169, 175, 181, 183, 193, 195, 199, 201, 213, 225, 229, 231, 235, 241, 243, 253, 259
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listen;
history;
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OFFSET
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1,1
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COMMENTS
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A048974, A052147, A067187 and A088685 are very similar after dropping terms less than 13. - Eric W. Weisstein, Oct 10 2003
A117530(n,2) = a(n) for n>1. - Reinhard Zumkeller, Mar 26 2006
a(n) = A000040(n) + 2 = A008864(n) + 1 = A113395(n) - 1 = A175221(n) - 2 = A175222(n) - 3 = A139049(n) - 4 = A175223(n) - 5 = A175224(n) - 6 = A140353(n) - 7 = A175225(n) - 8. - Jaroslav Krizek, Mar 06 2010
Left edge of the triangle in A065342. - Reinhard Zumkeller, Jan 30 2012
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LINKS
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Vincenzo Librandi, Table of n, a(n) for n = 1..1000
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MATHEMATICA
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Prime[Range[22]]+2 (* Vladimir Joseph Stephan Orlovsky, Apr 29 2008 *)
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PROG
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(MAGMA) [p+2: p in PrimesUpTo(400)]; // Vincenzo Librandi, Nov 27 2013
(Haskell)
a052147 = (+ 2) . a000040 -- Reinhard Zumkeller, Jul 03 2015
(PARI) a(n)=prime(n)+2 \\ Charles R Greathouse IV, Jan 19 2017
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CROSSREFS
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A139690 is a subsequence.
Cf. A040976, A000040.
Sequence in context: A239276 A284132 A263427 * A139690 A283559 A284190
Adjacent sequences: A052144 A052145 A052146 * A052148 A052149 A052150
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KEYWORD
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nonn,easy
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AUTHOR
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Simon Colton (simonco(AT)cs.york.ac.uk), Jan 24 2000
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STATUS
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approved
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