A175221 a(n) = prime(n) + 4.

6, 7, 9, 11, 15, 17, 21, 23, 27, 33, 35, 41, 45, 47, 51, 57, 63, 65, 71, 75, 77, 83, 87, 93, 101, 105, 107, 111, 113, 117, 131, 135, 141, 143, 153, 155, 161, 167, 171, 177, 183, 185, 195, 197, 201, 203, 215, 227, 231, 233, 237, 243, 245, 255, 261, 267, 273, 275

Offset: 1

Author

Jaroslav Krizek, Mar 06 2010

Keywords

• nonn

Links

• G. C. Greubel, Table of n, a(n) for n = 1..10000

Programs

GAP

Filtered([1..300], k-> IsPrime(k) ) + 4; # G. C. Greubel, May 20 2019

Magma

[(p+4):p in PrimesUpTo(500)]; // Vincenzo Librandi, Dec 04 2010

Mathematica

Prime[Range[60]]+4 (* Harvey P. Dale, Jan 01 2013 *)

PARI

{a(n) = prime(n) + 4}; \\ G. C. Greubel, May 20 2019

Sage

[nth_prime(n) + 4 for n in (1..60)] # G. C. Greubel, May 20 2019

Formula

a(n) = A000040(n) + 4 = A008864(n) + 3 = A052147(n) + 2 = A113395(n) + 1.

a(n) = A175222(n) - 1 = A139049(n) - 2 = A175223(n) - 3.

a(n) = A175224(n) - 4 = A140353(n) - 5 = A175225(n) - 6.

Extensions

More terms from Vincenzo Librandi, Mar 14 2010