A280419 Primes in A132934.

1468910121415161820212224252627283032333435363839, 14689101214151618202122242526272830323334353638394042444546484950515254555657586062636465666869

Offset

1,1

Comments

Primes that can be obtained from concatenation of the nonprime numbers.

In other words: primes that can be obtained from concatenation of 1 and the next consecutive composite numbers.

For a(n), the smallest prime divisor is a(n) and a(n) is a term of A241845.

Links

Table of n, a(n) for n=1..2.

Prime Curios!, 39

Crossrefs

Cf. A002808, A018252, A132934, A241845.

Sequence in context: A292858 A135956 A095490 * A292993 A095492 A095494

Adjacent sequences: A280416 A280417 A280418 * A280420 A280421 A280422

Keyword

nonn,base,bref

Author

Sergey Pavlov, Jan 02 2017

Status

approved