A234850 Primes in A014692, i.e., of the form prime(k)-k+1, for some k.

2, 2, 3, 7, 11, 29, 43, 53, 61, 73, 97, 139, 149, 179, 223, 283, 313, 349, 373, 461, 467, 491, 541, 599, 619, 659, 727, 787, 859, 907, 911, 919, 941, 1019, 1087, 1091, 1187, 1223, 1249, 1283, 1301, 1321, 1433, 1471, 1481, 1511, 1523, 1543

Offset: 1

Author

M. F. Hasler, Dec 31 2013

Keywords

• nonn

Comments

The first term is listed twice because A014692(1) = 2-1+1 = A014692(2) = 3-2+1 = 2 both are prime; thereafter the sequence A014692 is strictly increasing, so there is no other duplicate value.

Crossrefs

Cf. A234695.

Programs

PARI

for(k=1,999,isprime(p=prime(k)-k+1)&&print1(p","))

Formula

a(n) = prime(A234851(n)), prime = A000040.