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A179437 |2n - prime(n)|. 2
0, 1, 1, 1, 1, 1, 3, 3, 5, 9, 9, 13, 15, 15, 17, 21, 25, 25, 29, 31, 31, 35, 37, 41, 47, 49, 49, 51, 51, 53, 65, 67, 71, 71, 79, 79, 83, 87, 89, 93, 97, 97, 105, 105, 107, 107, 117, 127, 129, 129, 131, 135, 135, 143, 147, 151, 155, 155, 159, 161, 161, 169, 181, 183, 183, 185, 197 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

MATHEMATICA

Table[Abs[2 n - Prime[n]], {n, 1, 100}] (* Vincenzo Librandi, Aug 26 2014 *)

PROG

(PARI) a(n)=abs(2*n-prime(n)) \\ Charles R Greathouse IV, Aug 25 2014

(MAGMA) [Abs(2*n-NthPrime(n)): n in [1..70]]; // Vincenzo Librandi, Aug 26 2014

CROSSREFS

A variant of A173072. Cf. A000040.

Sequence in context: A125960 A141584 A287195 * A136791 A213933 A091916

Adjacent sequences:  A179434 A179435 A179436 * A179438 A179439 A179440

KEYWORD

nonn,easy,less

AUTHOR

Odimar Fabeny, Jul 14 2010

EXTENSIONS

More terms from N. J. A. Sloane, Jul 14 2010

STATUS

approved

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Last modified May 27 02:54 EDT 2019. Contains 323597 sequences. (Running on oeis4.)