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 A241265 Numbers n such that n^4+(n+1)^4 is not prime. 1
 5, 7, 10, 11, 15, 17, 18, 19, 20, 21, 22, 23, 24, 28, 29, 30, 32, 35, 39, 41, 42, 44, 45, 46, 47, 49, 50, 51, 52, 53, 55, 56, 57, 58, 59, 60, 61, 62, 64, 65, 66, 69, 70, 71, 73, 75, 76, 77, 79, 80, 81, 83, 84, 85, 86, 90, 91, 92, 93, 94, 95, 96, 99, 100, 101 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 FORMULA 7 is in this sequence because 7^4+8^4 = 6497 = 73*89. MATHEMATICA Select[Range[200], ! PrimeQ[#^4 + (# + 1)^4] &] PROG (Magma) [n: n in [1..200] | not IsPrime(n^4+(n+1)^4)]; CROSSREFS Complement of A155211. Sequence in context: A028759 A278579 A088707 * A189290 A129415 A075275 Adjacent sequences: A241262 A241263 A241264 * A241266 A241267 A241268 KEYWORD nonn,easy AUTHOR Vincenzo Librandi, Apr 20 2014 STATUS approved

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Last modified December 5 23:11 EST 2023. Contains 367594 sequences. (Running on oeis4.)