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Search: id:A126233
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| A126233 |
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Smallest number k such that (prime(k+1)+prime(k))/2 is odd and divisible by n-th odd prime. |
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+0
8
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| 4, 6, 8, 25, 12, 88, 78, 19, 121, 24, 29, 46, 31, 126, 186, 153, 156, 379, 197, 139, 280, 132, 285, 380, 155, 63, 334, 1005, 203, 75, 77, 516, 314, 445, 87, 1075, 93, 95, 1872, 254, 697, 1201, 270, 425, 429, 447, 304, 2187, 124, 488, 1153, 128, 335, 136, 547, 742
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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f[n_] := Block[{k = 1, c}, While[c = (Prime[k + 1] + Prime[k])/2; Mod[c, 2] == 0 || Mod[c, Prime[n + 1]] > 0, k++ ]; k]; Table[f[n], {n, 56}] (*Chandler*)
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CROSSREFS
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Cf. A072569, A072572, A072573, A126228, A126229, A126230, A124619, A124620, A126231, A124622.
Sequence in context: A063719 A106366 A019160 this_sequence A059889 A058011 A089330
Adjacent sequences: A126230 A126231 A126232 this_sequence A126234 A126235 A126236
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Dec 21 2006
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EXTENSIONS
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Edited and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Jan 09 2007
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