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A001172
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Smallest even number which is an unordered sum of two odd primes in exactly n ways.
(Formerly M4085 N1694)
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11
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0, 6, 10, 22, 34, 48, 60, 78, 84, 90, 114, 144, 120, 168, 180, 234, 246, 288, 240, 210, 324, 300, 360, 474, 330, 528, 576, 390, 462, 480, 420, 570, 510, 672, 792, 756, 876, 714, 798, 690, 1038, 630, 1008, 930, 780, 960, 870, 924, 900, 1134, 1434, 840, 990, 1302
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| a(n) = A023036(n) for all n > 1.
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REFERENCES
| N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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LINKS
| T. D. Noe, Table of n, a(n) for n = 0..10000
Index entries for sequences related to Goldbach conjecture
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MATHEMATICA
| nn = 55; a = Table[0, {nn}]; n = 6; While[Times @@ a == 0, c = 0; k = 3; While[k <= n/2, If[PrimeQ[k] && PrimeQ[n - k], c++]; k++]; If[c <= nn && a[[c]] == 0, a[[c]] = n]; n = n + 2]; Prepend[a, 0]
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CROSSREFS
| Cf. A000954, A000974, A002375, A005843.
Sequence in context: A157037 A189992 A082917 * A108605 A063765 A085712
Adjacent sequences: A001169 A001170 A001171 * A001173 A001174 A001175
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KEYWORD
| nonn,nice,easy
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Eric Wolman
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EXTENSIONS
| a(0) corrected by Zak Seidov (zakseidov(AT)yahoo.com), Sep 30 2011
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