The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A075038 Primes for which the six closest primes are smaller. 8
 1327, 14563, 15683, 19609, 22307, 25471, 31397, 33647, 35617, 39251, 43801, 44293, 49559, 69263, 69499, 76003, 79699, 81569, 82073, 85853, 88681, 88819, 89689, 95819, 102701, 118931, 124367, 132547, 132763, 140009, 142993, 143833 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..2000 EXAMPLE The six closest primes to 1327 are 1321 (difference = 6), 1319 (difference = 8), 1307 (different = 20), 1303 (difference = 24), 1301 (difference =26) and 1297 (difference = 30). 1321, 1319, 1307, 1303, 1301 and 1297 are all smaller than 1327, so 1327 is in the list. MATHEMATICA NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; ps = {0, 0, 0, 0, 0, 0, 0, 1}; Do[ps = Drop[ps, 1]; ps = Append[ps, NextPrim[ ps[[ -1]]]]; If[ ps[[ -1]] - ps[[ -2]] > ps[[ -2]] - ps[[1]], Print[ ps[[ -2]]]], {n, 1, 13872}] Select[Prime[Range[15000]], #-NextPrime[#, -6]

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 30 04:28 EDT 2023. Contains 363044 sequences. (Running on oeis4.)