[go: up one dir, main page]

login
A074383
Difference between (1+10^n)-th and (10^n)-th primes.
1
1, 2, 6, 8, 14, 12, 4, 18, 8, 24, 6, 42, 18, 48, 60, 52, 48, 8, 22, 20, 60, 38, 54, 48, 58
OFFSET
0,2
FORMULA
a(n) = prime(1+10^n) - prime(10^n).
a(n) = A151800(A006988(n)) - A006988(n).
EXAMPLE
a(18)=22 because the (10^18)th prime is 44211790234832169331, the (1+10^18)th prime is 44211790234832169353.
CROSSREFS
KEYWORD
hard,more,nonn
AUTHOR
Labos Elemer, Aug 22 2002
EXTENSIONS
a(19) from Max Alekseyev, May 08 2009
a(20)-a(22) from Max Alekseyev, Dec 04 2014
a(23)-a(24) from Chai Wah Wu using the terms in A006988, Sep 18 2018
STATUS
approved