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 A256737 Number of composites lying between successive pairs of primes, beginning with pair (2,3). Bisection of A046933. 1
 0, 1, 1, 1, 5, 5, 1, 5, 1, 3, 5, 5, 3, 3, 3, 3, 1, 1, 5, 5, 1, 1, 1, 11, 1, 5, 9, 5, 1, 3, 9, 3, 3, 5, 1, 5, 5, 3, 7, 7, 1, 1, 3, 7, 1, 11, 3, 3, 11, 17, 9, 5, 5, 5, 1, 5, 1, 9, 3, 5, 11, 5, 9, 9, 5, 3, 5, 7, 13, 11, 9, 3, 9, 3, 3, 3, 3, 3, 9, 3, 5, 3, 5, 5, 3, 1, 1, 9, 9, 5, 3, 3, 5, 5, 21 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 LINKS Table of n, a(n) for n=1..95. EXAMPLE For the third term in the sequence, use prime pair (11,13). Only composite that lies between is "12", thus the third value in the sequence is "1". MATHEMATICA Flatten[Differences/@Partition[Prime[Range[200]], 2]]-1 (* Harvey P. Dale, Dec 17 2023 *) PROG (PARI) a(n)=my(q=prime(2*n)); q-precprime(q-1)-1 \\ Charles R Greathouse IV, Apr 21 2015 CROSSREFS Complement of A256736 with respect to A046933. Sequence in context: A282969 A046095 A322545 * A055183 A198740 A082956 Adjacent sequences: A256734 A256735 A256736 * A256738 A256739 A256740 KEYWORD nonn AUTHOR Peter Woodward, Apr 09 2015 STATUS approved

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Last modified February 25 19:44 EST 2024. Contains 370332 sequences. (Running on oeis4.)