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 A031505 Upper prime of a difference of 4 between consecutive primes. 9
 11, 17, 23, 41, 47, 71, 83, 101, 107, 113, 131, 167, 197, 227, 233, 281, 311, 317, 353, 383, 401, 443, 461, 467, 491, 503, 617, 647, 677, 743, 761, 773, 827, 857, 863, 881, 887, 911, 941, 971, 1013, 1091, 1097, 1217, 1283, 1301, 1307, 1427, 1433, 1451 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A029710(n-1) + 4 = A029708(n) + 2. MAPLE for i from 1 to 232 do if ithprime(i+1) = ithprime(i) + 4 then print({ithprime(i+1)}); fi; od; # Zerinvary Lajos, Mar 19 2007 MATHEMATICA Select[Partition[Prime[Range[250]], 2, 1], #[[2]]-#[[1]]==4&][[All, 2]] (* Harvey P. Dale, Feb 02 2023 *) CROSSREFS Essentially the same as A046132. Sequence in context: A316188 A096454 A099722 * A094524 A243817 A098412 Adjacent sequences: A031502 A031503 A031504 * A031506 A031507 A031508 KEYWORD nonn AUTHOR Jeff Burch EXTENSIONS Corrected and extended by Henry Bottomley, Jul 18 2000 Definition clarified by Harvey P. Dale, Feb 02 2023 STATUS approved

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Last modified December 6 09:20 EST 2023. Contains 367600 sequences. (Running on oeis4.)