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 A230811 Smallest starting number for n consecutive odd numbers that are primes or strong pseudoprime (base 2). 0
 3, 3, 3, 1640293473202755797 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS It is conjectured that there can be at most one more term, a(5). LINKS EXAMPLE First and smallest occurrence of n, n >= 1, consecutive odd numbers that are primes or strong pseudoprime (base 2): a(1) = 3: (3) ; a(2) = 3: (3, 5) ; a(3) = 3: (3, 5, 7); a(4) = 1640293473202755797: (1640293473202755797, 1640293473202755799, 1640293473202755801, 1640293473202755803); (1640293473202755801 is strong pseudoprime base 2 and others are prime); CROSSREFS Cf. A001567, A001262, A230667, A230810. Sequence in context: A343120 A230667 A131462 * A117032 A243823 A281141 Adjacent sequences:  A230808 A230809 A230810 * A230812 A230813 A230814 KEYWORD nonn,hard,fini AUTHOR Shyam Sunder Gupta, Oct 30 2013 STATUS approved

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Last modified May 22 09:50 EDT 2022. Contains 353949 sequences. (Running on oeis4.)