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 A224700 a(n) = smallest prime p such that p + prime(n)# is next prime after p, where primorial prime(n)# = 2*3*..*prime(n). 0
 3, 23, 4297, 20831323 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(5) > 10^20. LINKS Table of n, a(n) for n=1..4. FORMULA a(n) = A000230(A002110(n)/2). EXAMPLE a(2)=23 because 23 is smallest prime such that 23+2*3=29 is next prime. CROSSREFS Cf. A001223, A000230. Sequence in context: A371346 A347680 A113577 * A352333 A355960 A264929 Adjacent sequences: A224697 A224698 A224699 * A224701 A224702 A224703 KEYWORD nonn,hard,more AUTHOR Thomas Ordowski, Apr 16 2013 STATUS approved

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Last modified May 18 03:12 EDT 2024. Contains 372617 sequences. (Running on oeis4.)