A086060 Concatenation of the larger members of first n pairs of twin primes.

5, 57, 5713, 571319, 57131931, 5713193143, 571319314361, 57131931436173, 57131931436173103, 57131931436173103109, 57131931436173103109139, 57131931436173103109139151, 57131931436173103109139151181

Offset

3,1

Comments

5713...20832089 is the only prime for n up to 10000.

Links

Table of n, a(n) for n=3..15.

Prog

(PARI) concattwpr(n) = { y=5; print1(5", "); forprime(x=7, n, if(isprime(x-2), y=eval(concat(Str(y), Str(x))); print1(y", ") ) ) }

Crossrefs

Cf. A086043, A086158.

Sequence in context: A209460 A209522 A213796 * A068003 A295902 A290343

Adjacent sequences: A086057 A086058 A086059 * A086061 A086062 A086063

Keyword

nonn,base

Author

Cino Hilliard, Sep 08 2003

Status

approved