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A131426 a(n) = 2*prime(n) - 3. 8
1, 3, 7, 11, 19, 23, 31, 35, 43, 55, 59, 71, 79, 83, 91, 103, 115, 119, 131, 139, 143, 155, 163, 175, 191, 199, 203, 211, 215, 223, 251, 259, 271, 275, 295, 299, 311, 323, 331, 343, 355, 359, 379, 383, 391, 395, 419, 443, 451, 455, 463, 475, 479, 499, 511, 523, 535, 539, 551, 559, 563, 583, 611 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Right border of triangle A131424.

LINKS

Table of n, a(n) for n=1..63.

FORMULA

a(n) = 2*A000040(n) - 3.

EXAMPLE

a(4) = 11 = 2*p(4) - 3 = 2*7 - 3.

MAPLE

A131426:=n->2*ithprime(n)-3: seq(A131426(n), n=1..70); # Wesley Ivan Hurt, Mar 30 2015

MATHEMATICA

2#-3&/@Prime[Range[80]] (* Harvey P. Dale, Jul 24 2011 *)

PROG

(MAGMA) [2*NthPrime(n) - 3: n in [1..65]]; // Vincenzo Librandi, Mar 30 2015

(PARI) a(n) = 2*prime(n) - 3 \\ Charles R Greathouse IV, Jul 12 2016

CROSSREFS

Cf. A000040, A062709, A131424.

Sequence in context: A094179 A085760 A179481 * A080978 A160216 A181516

Adjacent sequences:  A131423 A131424 A131425 * A131427 A131428 A131429

KEYWORD

nonn,easy

AUTHOR

Gary W. Adamson, Jul 10 2007

STATUS

approved

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Last modified August 3 02:48 EDT 2021. Contains 346435 sequences. (Running on oeis4.)