A074383 Difference between (1+10^n)-th and (10^n)-th primes.

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

Links

Table of n, a(n) for n=0..24.

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

Cf. A006988, A074325, A038833, A074382.

Sequence in context: A266627 A289753 A002511 * A107505 A074400 A264598

Adjacent sequences: A074380 A074381 A074382 * A074384 A074385 A074386

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