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A260517 Numbers equidistant from twin prime pairs that are also equidistant from numbers equidistant from twin prime pairs. 1
51, 105, 144, 165, 234, 255, 276, 630, 1041, 2289, 2325, 2466, 4251, 5460, 9006, 9699, 10380, 10479, 12006, 13701, 14166, 15690, 18090, 19425, 20190, 20295, 21540, 26706, 26796, 32487, 32871, 33684, 33789, 35520, 37455, 38661, 41685, 42771, 46515, 47760 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
165 is a term because it is equidistant from 144 and 186. 144 and 186 are both equidistant from twin primes, according to A074953.
MATHEMATICA
t = Select[ Prime@ Range@ 5000, PrimeQ[# + 2] &]; d = Differences@ t; (t[[#+1]] + t[[#+2]]& /@ Select[ Range[ Length[d] - 2], d[[#]] == d[[#+2]] &])/2 + 1 (* Robert G. Wilson v, Jul 29 2015 *)
CROSSREFS
Cf. A001097 (Twin primes), A074953 (Numbers equidistant from twin prime pairs).
Sequence in context: A044140 A044521 A160847 * A235878 A015705 A359088
KEYWORD
nonn
AUTHOR
Peter Woodward, Jul 27 2015
STATUS
approved

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Last modified July 14 15:35 EDT 2024. Contains 374322 sequences. (Running on oeis4.)