1,3

Table of n, a(n) for n=1..62.

50 is in the sequence because A151800(50)=53, and 50+53=103 is prime.

(PARI){for(i=0, 10^3, k=i+nextprime(i+1); if(isprime(k), print1(i, ", ")))}

Cf. A151800, A249666, A249667, A249676.

Sequence in context: A212124 A213374 A271729 * A104636 A212014 A270050

Adjacent sequences: A249621 A249622 A249623 * A249625 A249626 A249627

nonn

Antonio Roldán, Dec 03 2014

approved