1,1

Table of n, a(n) for n=1..44.

If isprime(p(n) & p(n-1)) then sequence.add(p(n))

a(2) = 53 because 53 concatenated with the preceding prime (47) yields 5347 which is also prime.

Cf. A088784.

Sequence in context: A216459 A107803 A255579 * A257667 A045711 A090153

Adjacent sequences: A088709 A088710 A088711 * A088713 A088714 A088715

base,nonn

Chuck Seggelin (barkeep(AT)plasteredDragon.com), Oct 15 2003

approved