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 A338273 a(n) is the sum of A338270(n) and the average of the primes immediately before and after A338270(n). 3
 47, 73, 157, 167, 179, 263, 467, 719, 733, 757, 877, 887, 1021, 1327, 1367, 1453, 1613, 1997, 2027, 2477, 2593, 2633, 2767, 2879, 3001, 3083, 3119, 3203, 3307, 3583, 3623, 3733, 3779, 4021, 4157, 4217, 4273, 4327, 4561, 4703, 4787, 4801, 4933, 5087, 5153, 5387, 5399, 5573, 5701, 5879, 6343, 6359 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS All terms are prime. LINKS Robert Israel, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A338270(n) + (A151799(A338270(n))+A151800(A338270(n)))/2. EXAMPLE A338270(3) = 79 with previous and next primes 73 and 83, so a(3) = 79 + (83+83)/2 = 157. MAPLE q:= 3: r:= 5: count:= 0: R:= NULL: while count < 100 do p:= q; q:= r; r:= nextprime(r); if isprime((p+2*q+r)/2) then count:=count+1; R:= R, p + (q+r)/2; fi od: R; CROSSREFS Cf. A151799, A151800, A338270. Sequence in context: A369957 A052231 A092178 * A165335 A039425 A043248 Adjacent sequences: A338270 A338271 A338272 * A338274 A338275 A338276 KEYWORD nonn AUTHOR J. M. Bergot and Robert Israel, Oct 19 2020 STATUS approved

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Last modified September 10 18:00 EDT 2024. Contains 375792 sequences. (Running on oeis4.)