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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
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
Sequence in context: A371346 A347680 A113577 * A352333 A355960 A264929
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.)