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 A181423 Primes such that the square of the sum of itself and next prime, when added to 5, is a prime 1
 5, 17, 37, 79, 97, 101, 127, 181, 227, 229, 241, 283, 311, 359, 389, 397, 421, 457, 521, 547, 577, 631, 769, 787, 811, 821, 859, 967, 1021, 1039, 1051, 1109, 1153, 1327, 1399, 1429, 1447, 1523, 1579, 1597, 1699, 1721, 1723, 1787, 1871, 1997, 1999, 2081, 2141 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS [p(i)+p(i+1)]^2+5 is a prime. LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE a(5)=97 since (97+101)^2+5=198^2+5=39204+5=39209 is a prime. MATHEMATICA Transpose[Select[Partition[Prime[Range[400]], 2, 1], PrimeQ[Total[#]^2+ 5]&]] [[1]] (* Harvey P. Dale, Feb 15 2014 *) CROSSREFS Cf. A000045, A181421, A181422 Sequence in context: A348228 A107199 A048209 * A146874 A145012 A360204 Adjacent sequences: A181420 A181421 A181422 * A181424 A181425 A181426 KEYWORD nonn AUTHOR Carmine Suriano, Oct 18 2010 EXTENSIONS Values 521, 547, 577, 769,.. inserted by R. J. Mathar, Oct 18 2010 STATUS approved

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Last modified February 24 10:16 EST 2024. Contains 370294 sequences. (Running on oeis4.)