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A172367 Numbers n > 0 such that n+4 is a prime. 18
1, 3, 7, 9, 13, 15, 19, 25, 27, 33, 37, 39, 43, 49, 55, 57, 63, 67, 69, 75, 79, 85, 93, 97, 99, 103, 105, 109, 123, 127, 133, 135, 145, 147, 153, 159, 163, 169, 175, 177, 187, 189, 193, 195, 207, 219, 223, 225, 229, 235, 237, 247, 253, 259, 265, 267, 273, 277, 279 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Sameen Ahmed Khan, Table of n, a(n) for n = 1..10000

Sameen Ahmed Khan, Primes in Geometric-Arithmetic Progression, arXiv:1203.2083v1 [math.NT], (Mar 09 2012).

FORMULA

a(n)=(n+2)th prime-4.

EXAMPLE

a(1)=5-4=1, a(2)=7-4=3.

MATHEMATICA

Table[Prime[n]-4, {n, 3, 53}] (* Charles R Greathouse IV, Mar 12 2012 *)

PROG

(PARI) a(n)=prime(n+2)-4 \\ Charles R Greathouse IV, Mar 12 2012

CROSSREFS

Cf. A000040, A006093, A040976, A086801.

Sequence in context: A111225 A032678 A073671 * A024901 A258011 A000959

Adjacent sequences:  A172364 A172365 A172366 * A172368 A172369 A172370

KEYWORD

nonn,easy

AUTHOR

Juri-Stepan Gerasimov, Feb 01 2010

STATUS

approved

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Last modified March 30 12:10 EDT 2020. Contains 333125 sequences. (Running on oeis4.)